<?xml version="1.0"?><!DOCTYPE article SYSTEM "/project/take/software/searchbench_offline_processing/paperxml_generator/aclextractor/src/python/../resource/dtd/paperxml.dtd"><article><header><firstpageheader><page local="1"/><title>Disambiguation by Information Structure in DRT</title><author surname="Eberle" givenname="Kurt"><org  name="Institut für Maschinelle Sprachverarbeitung Universität Stuttgart Azenbergstr"/></author></firstpageheader><frontmatter><p><b>Disambiguation by Information Structure in DRT</b></p><p><b>Kurt Eberle *</b></p><p>Institut für Maschinelle Sprachverarbeitung Universität Stuttgart Azenbergstr. <b>12 </b>D-70174 Stuttgart</p></frontmatter><abstract>Text understanding and high quality machine translation often necessitate the disambiguation of ambigous struc­tures or lexical elements. Drawing in­ferences from the context can be a means for resolving semantic ambigu­ities. However, often, this is an ex­pensive strategy that, in addition, not always comes up with a clear prefer­ence for one of the alternatives. In this paper, we argue that in a num­ber of cases deep semantic analyses can be avoided by taking into account the constraints that the alternative readings impose onto the information structure. To this end, we present a study of the ambigous German adverb <i>erst </i>and point out the particular circumstances under which the given information structure disambiguates the adverb without fur­ther semantic analysis. </abstract></header><body><section number="1" title="Introduction"><p>German <i>erst </i>is ambigous. Consider the following examples:</p><p>(1)   Peter zeigte erst auf die vierte Glückszahl. <i>a.) Und dann auf die zweite.</i></p><p>(Peter first pointed to the fourth lucky number. And then to the second.)</p><p><i>b) Nicht zuvor auf die erste, zweite oder dritte. </i>(Peter only pointed to the fourth lucky number. Not to the first, second or third.) <i>c) Noch nicht auf die fünfte.</i><i></i></p><p>(Peter only pointed to the fourth lucky number so far. Not yet to the fifth.)</p><p>The alternative contexts a) - c) determine the meaning of the first sentence of (1) according to</p><p>*This paper describes research done within the <b><i>Sonderforschunsbereich 3^0 </i></b>at IMS. I would like to thank Anette Frank, Hans Kamp, Michael Schiehlen and the other members of the IMS semantics group for lielpfull discussion.</p><p>the disambiguating translations presented. The example testifies the following three uses of <i>erst.</i></p><p>• In the context (l.a), the recipient under­stands the introduced event as the first of a sequence of events that he expects to be completed by the following text. Wc call this reading:</p><p>the First of a Sequence-reading (FS).</p><p>• In the context (l.b), the recipient under­stands <i>erst </i>as a signal of the speaker/writer that the occurrence of the reported event is not preceded by the occurrence of similar (al­ternative) events. We call this reading:</p><p>the Exclusion of Preceding Alternatives-reading (EPA).</p><p>• In the context (l.c), the recipient under­stands the event as element of a sequence of events, and the realization of the sequence, in particular the reported realization of the event at the textual perspective time, seems to be in retardation, with regard to some (previous) expectation about the realization dates of the sequence. We call this reading: the <u>Retardation-</u>reading (R).</p><p>As can be seen from the example, the contextual disambiguation not only is needed for understand­ing the text, but is a prerequisite for high quality translation.</p><p>In the literature, different formalizations have been discussed ((KÖn79), (Löb89), (Kön91), (HR81) (the latter one for the similar <i>noch </i>and <i>schon) </i>and others). With respect to the focus ad­verb use (the cases (l.b) and (l.c); (l.a) being an example of the temporal adverb use), mod­ellings are prevailing that associate <i>erst </i>with dif­ferent scales (cf. (Löb89)). However, a precise evaluation of the context that can decide about the relevant reading (for instance, what infor­mation defines which scale) is still missing. We tackle this problem in the framework of Discourse Representation Theory (DRT) (Kam81), assum­ing that discourse representations (DRSs) may be augmented by information structure.</p><doubt alpha="0.0" length="4" tooSmall="False" monospace="0.0">3 34</doubt><page local="2"/></section><section number="2" title="The (?r.s/-readings, their"><p><b>entailments, presuppositions and implicatures</b></p><subsection number="2.1" title="The First, of a Sequence interpretation"><p>In this paper, we cannot go into detail with tests that partition the meaning of a sentence into pre­suppositions, assertions proper and implicatures the recipient is allowed to draw from the sentence (cf. (Lcv83) for an overview of the notions used, the tests associated with them and the problems connected to them). We directly come up with the DRSs that, to our opinion, represent the im­pact of the different readings. We begin with the FS-reading of (1):</p><p>~pëTcFnow c f TP(t)</p><doubt alpha="30.8" length="13" tooSmall="False" monospace="0.0">t -&lt; now_____</doubt><doubt alpha="58.8" length="34" tooSmall="False" monospace="0.0">(l.a)fVdc-f(X{\tc^liicksz*hl(x) ])</doubt><doubt alpha="64.5" length="31" tooSmall="False" monospace="0.0">e: zeigciiTauf (peter, x) c 0 t</doubt><doubt alpha="25.0" length="12" tooSmall="False" monospace="0.0">&lt;v,.,(e',[^j</doubt><doubt alpha="52.9" length="17" tooSmall="False" monospace="0.0">c startscP_______</doubt><p>Here, TP stands for the actual (past) temporal perspective that holds for the given utter­ance/text situation. With respect to the represen­tation and resolution of presuppositions in DRT, we relate to (vdS92). Wo slightly deviate from the approach suggested there, however, in that we use a notation for the presupposition triggers that is akin to the suggestion of (BES+94): we use so-called <i>a-conditions </i>which describe the presup­posed objects and their characterization. In our framework «-conditions subsume différent types of projection problems. The type is characterized by the «-index <i>(prcsp </i>stands for 'classical' presup­positions, <i>dc.f </i>for definite descriptions, <i>ri </i>for ref­erence time, <i>re </i>for reference event etc., compare (I0be95) for an overview). This index triggers the projection routine that is specific to the respec­tive resolution problem. The first argument of the condition schema highlights the distinguished discourse referent (DRF) of the structure to be projected. <footnote anchor="1"/> The representation, thus, requires a definite description style resolution for the <i>x </i>that is characterized as a <i>fourth, lucky number </i>(with respect to the given setting, <i>x </i>together with its description will be accomodated at the main level DRS), and if presupposes a reference event c' such that the sentence (went <i>c. </i>is the first event of a possible elaboration sequence of <i>c' </i>(cf. (Ebe92) for the computation and storing of discourse rela-</p><p>' As regards definite descriptions, the distinguished 1)R.F is the DRF of the head noun; in any case it is the DRF the «-information is centered around.</p><p>Modeltheoretically the relation between the presup-positioual part and the assertional part of a DRS can be seen as a function from information states into in­formation states, see (Kam95).</p><p>tions like <i>elaboration).</i></p></subsection><subsection number="2.2" title="The Exclusion of Preceding Alternatives interpretation"><p>In the EPA-reading, <i>erst </i>is used as a focus adverb, i.e. it structures its argument into focus and back­ground. Tn the following representation of (1), we consider the case where the numeral is focused only, not the MP containing the numeral or the entire event description in the scope of <i>erst</i></p><p>Hesides the assertion that Peter points to the fourth lucky number at the temporal perspective <i>t, </i>the representation presupposes a sum 10 con­sisting of a sequence of events <b>ei </b>- ej, that are related via a non further specified relation R to predicates Pi - Pfc. These P,- are required to be alternatives of the event description in the scope of <i>erst </i>(which is called A e. DRSC). In this paper, we cannot go into detail with the computation of the alternatives of event descriptions. l\ G <i>AL'</i><i>Id </i><i>us cl</i>where ALTy;,/f.s6 = {Ae.<i>DRSe[,?0(;cl</i><i>(dhs,,)\q</i><i>] \ Q </i>G <i>ALT(FOCc,(DR,Se))}, </i>sketches the claim that the P <b>j </b>are event descriptions that develop from Ae.DRSe by exchanging the focused element by an alternative (Compare (Roo85), (Roo92) for the underlying focus theory and (RE95) for an algorithm that calculates the concrete alterna­tives). As mentioned, the focused element, which is marked by the underline, is assumed to be the numeral adjective. This choice trig­gers the structuring of the Ps into the back­ground event type <i>Xc.HAC(DRSe) </i>(which is A c. <u>rLi</u><u>Ko„I</u><b><u>^,TruM</u></b><u>,~x7D</u> and the focused se­mantic constituent <i>Xx.FO('(DRS</i><i>e)[4\„] </i>(which is peter now e t el <b><i>c.</i></b><b><i>'l</i></b><b><i> c'A </i></b><b><i>vA</i></b><b><i> </i></b>TP(t)</p><doubt alpha="40.0" length="5" tooSmall="False" monospace="0.0">(l.b)</doubt><doubt alpha="36.4" length="11" tooSmall="False" monospace="0.0">t -&lt; now___</doubt><doubt alpha="64.0" length="25" tooSmall="False" monospace="0.0">a^f(X^iu^liicksy,ahl( x))</doubt><doubt alpha="60.0" length="30" tooSmall="False" monospace="0.0">e: zeigeu_auf (peter, x) c 0 t</doubt><doubt alpha="60.0" length="5" tooSmall="False" monospace="0.0">eC C4</doubt><p>b = <i>r,'=k </i><b>e,.</b></p><doubt alpha="13.3" length="30" tooSmall="False" monospace="0.0">a;=1k-^+l)a;:, *&lt;«.•■'■.•&gt;___,</doubt><doubt alpha="0.0" length="1" tooSmall="False" monospace="0.0">)</doubt><p><b>e;' C e.</b></p><doubt alpha="57.7" length="26" tooSmall="False" monospace="0.0">4te_Kliic k ri z ;i h l^x^</doubt><doubt alpha="66.7" length="12" tooSmall="False" monospace="0.0">optional - -</doubt><doubt alpha="54.5" length="11" tooSmall="False" monospace="0.0">ATT(£,&lt;EXl'</doubt><doubt alpha="80.0" length="5" tooSmall="False" monospace="0.0">now ë</doubt><doubt alpha="80.0" length="5" tooSmall="False" monospace="0.0">èC ej</doubt><doubt alpha="0.0" length="1" tooSmall="False" monospace="0.0">»</doubt><doubt alpha="0.0" length="4" tooSmall="False" monospace="0.0">33 5</doubt><table class="main" frame="box" rules="all" border="1" regular="False"><tr class="row"><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td></tr><tr class="row"><td class="cell"></td><td class="cell"><p></p></td><td class="cell"><p><b>11 </b><i>K</i></p></td><td class="cell"><p><b>F</b></p></td><td class="cell"></td></tr><tr class="row"><td class="cell"></td><td class="cell"><p><b>4</b><b>=Ae.</b></p></td><td class="cell"><p><b>e : zeige il _au f( peter, x )</b></p></td><td class="cell"><p><b>"tie/fx.</b></p></td><td class="cell"></td></tr><tr class="row"><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td></tr></table><page local="3"/><doubt alpha="100.0" length="2" tooSmall="False" monospace="0.0">Ax</doubt><doubt alpha="66.7" length="6" tooSmall="False" monospace="0.0">"deft*</doubt><p><b><u>nte-filiickszahl(x)</u></b></p><doubt alpha="64.0" length="25" tooSmall="False" monospace="0.0">^here n is a number (l-c)</doubt><p>from the set of alternatives of 4). The relation R has to be understood as characterizing the <i>e, </i>as opportunities for Peter to point to (specific) num­bers. In (1), these opportunities may be situations that can be described by: <i>The firsiei / seconde2 / ihirde3 number- is presented to Peter. </i>The order of the opportunities is inherited from the order of the Ps, -&lt;o, which conforms to the intrinsic order of the set of alternatives of the focused element (i.e. <i>0=ordcr(ALT{FOCeA{DRSe)))). </i>In (1), this is the canonical order of the numbers.</p><p>The negation test, which is commonly used to detect presuppositions, supports these structural assumptions.</p><p>Now, we think that the EPA-reading inter­prètes the asserted event, which is backed by the described scenario, as the first one that is indeed realized within the range of possible instantiations that the sequence of opportunities provides, i.e. the asserted event presents the first positive out­come to the test about the instantiation of the Ae. <i>BAC (DRS e)-iyrje </i>that is connected to the e,-sequence, where each test situation e; is charac­terized by its own specific additional test criterion <i>\x.FOC(DRSe\A\n]. <footnote anchor="2"/></i></p><p>Further linguistic tests, that we must omit here, support the assumption that the information about the negative tests is an entailment. There­fore, in the representation, the negated DRSs for the pointing-opportunities ei - are part of the main DRS.</p><p>In the literature the representation of the fo­cusing use of <i>erst </i>(and corresponding uses of <i>noch </i>and <i>schon) </i>often comprises the information that the reported realization of the event is earlier or later (depending on the reading and the adverb) than the speaker/writer and/or the recipient (or even a third person) would have expected. We think that such an expectation, in the case of the EPA-reading of <i>erst, </i>is only optional. Fol­lowing (Kbn91), we think that, if present, it is not a presupposition but a conventional implicaturc. In (l.b), we use the specific ajmp(-format and the representation convention of (Kam95) for attitudi-nal states in order to express the EPA-expectation of a previous test to be successful.</p></subsection><subsection number="2.3" title="The Retardation interpretation"><p>As for the EPA-reading, we consider the case where the numeral is focussed only:</p><footnote label="2">üepcnding oh the focus structure of the phrase in the scope of erst m (1) and depending on the contex­tual restrictions of the admissible alternatives, other sets of Ps might result. It is clear that depending on this choice, the focus conditions may characterize a thematic role, as in the described example, or the event variable. It is also clear, as we will argue in the next section, that not all of these sets of alternatives can accept the EPA-reading.</footnote><doubt alpha="54.1" length="37" tooSmall="False" monospace="0.0">peter now e t ei 'c2' e.-s ' Iv TP(t)</doubt><doubt alpha="50.0" length="10" tooSmall="False" monospace="0.0">t -&lt;now_j_</doubt><doubt alpha="48.3" length="29" tooSmall="False" monospace="0.0">°&lt;def(x,4te_)!|ii&lt;:kszah](x))</doubt><doubt alpha="64.3" length="28" tooSmall="False" monospace="0.0">e: zeigen_auf(peter,x) e 0 t</doubt><p><b><i>Jî</i></b><b><i>-esp </i></b>(s</p><doubt alpha="52.9" length="17" tooSmall="False" monospace="0.0">:ATT(x, &lt; &lt;MODli,</doubt><p><b>MODE=PLAN <u>X=petcrU, i</u></b></p><doubt alpha="50.0" length="6" tooSmall="False" monospace="0.0">Jt = l</doubt><doubt alpha="41.2" length="17" tooSmall="False" monospace="0.0">A::r&lt;^+i&gt;a;ïîp^.&gt;</doubt><doubt alpha="33.3" length="15" tooSmall="False" monospace="0.0">a;:,-1f.-&lt;qr.+i</doubt><p><i>it.</i></p><p><b>e:'/eigen_aui(peter,x)</b> <b><u>4te_glückszahl(x)</u></b></p><doubt alpha="66.7" length="6" tooSmall="False" monospace="0.0">adef(*</doubt><doubt alpha="41.7" length="12" tooSmall="False" monospace="0.0">E'.= Eti e,'</doubt><doubt alpha="59.3" length="27" tooSmall="False" monospace="0.0">f\]_1rcalization_of(e,',e,)</doubt><p>s meets e'i ------optional or probably obligatory</p><doubt alpha="22.7" length="22" tooSmall="False" monospace="0.0">ei' -&lt; e2' ~&lt; e3' ~&lt; e</doubt><doubt alpha="55.6" length="9" tooSmall="False" monospace="0.0">a;mpi(s'&gt;</doubt><p>In contrast to the EPA-reading, we assume that, in the R-reading, the predicates P, that we ob­tain from the information structure of the <i>erst­</i>argument are not related to a sequence of opportu­nities for doing something, but describe events e, of an expectation about the ongoing of the world <i>ë </i>or a plan ë. The context (1) doesn't provide fur­ther information about the identity of the person or persons <i>x </i>to whom the introduced attitudinal state has to be ascribed, to the speaker/writer, to the recipient, to Peter, to someone else or to some group of salient people. Also it doesn't provide in­formation about the nature of the attitude MOD. The conditions that are introduced below the dot­ted line exemplify possible resolutions. According to this, Peter and the speaker/writer (i for the distinguished DRF for the self) share the attitude of having a plan for realizing r. Such resolutions may be available by an inference component that operates over richer contextual knowledge. Again, the order of the P, and the corresponding e; is in­ferred from the implicit order of the alternatives of the focused element. From this setting and the assertion of an occurrence of <i>Peter pointing to the fourth lucky number </i>at the temporal per­spective <i>t, </i>the representation entails realizations of those events of the presupposition line that precede the counterpart of e in the presupposed sequence. As a further (possibly optional) con­straint, the R-reading introduces the implicaturc that a non further specified person or group £ expected for the perspective time <i>t </i>that the planned or expected sequence of events should be realized to a greater degree.<page local="4"/> Without further information about the identity of it is difficult to say some­thing more precise about the temporal location of the ^-expectation than that an instance s' of the corresponding atfitudinal state holds at some time before the actual <i>now.</i></p><doubt alpha="0.0" length="3" tooSmall="False" monospace="0.0">336</doubt><doubt alpha="60.0" length="25" tooSmall="False" monospace="0.0">reatiz ation _of ( e,c4 )</doubt><table class="main" frame="box" rules="all" border="1" regular="False"><tr class="row"><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td></tr><tr class="row"><td class="cell"></td><td class="cell"><p><b>3'</b></p></td><td class="cell"><p></p></td><td class="cell"><p></p></td><td class="cell"><p></p></td><td class="cell"><p></p></td><td class="cell"></td></tr><tr class="row"><td class="cell"></td><td class="cell"><p>r</p></td><td class="cell"><p><b>E*</b></p></td><td class="cell"><p></p></td><td class="cell"><p></p></td><td class="cell"><p>1</p></td><td class="cell"></td></tr><tr class="row"><td class="cell"></td><td class="cell"><p><b>s':ATT(î,^&lt;BKL,</b></p></td><td class="cell"><p><b>realizatio </b><b>11 </b><b>_of _bcgi |E*| &gt; 4 E* -&lt; 1</b></p></td><td class="cell"><p><b>E*,]&lt;</b></p></td><td class="cell"><p><b>)</b></p></td><td class="cell"><p><b>&gt; &gt;</b></p></td><td class="cell"></td></tr><tr class="row"><td class="cell"></td><td class="cell"><p>I</p></td><td class="cell"><p></p></td><td class="cell"><p></p></td><td class="cell"><p>1 J</p></td><td class="cell"></td></tr><tr class="row"><td class="cell"></td><td class="cell"><p><b>s' -&lt; now</b></p></td><td class="cell"><p></p></td><td class="cell"><p></p></td><td class="cell"><p></p></td><td class="cell"><p></p></td><td class="cell"></td></tr><tr class="row"><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td><td class="cell"></td></tr></table></subsection></section><section number="3" title="Disambiguating Criteria"><subsection number="3.1" title="The Syntax Criterion"><p>In Gorman focus adverbs cannot be topicalized as such, i.e. they cannot occur in the vorfeld po­sition without an accompanying constituent (cf. (Kön9l)). If the sentence shows such a topicaliza-tion of <i>erst </i>- which is marked by the inversion of the basic Subj-Vf in-order - <i>erst </i>can oidy be used as a time adverb, i.e. its meaning can only be the FS-reading, as exemplified by (2): (2) <i>Erst gab Peter Marin den Uriel'.</i></p><p>(First, Peter handed the letter to Maria.)</p><p>Thus, this type of fopicalization disambiguates be­tween the FS-reading on the one hand and the EPA- and R-reading on the other. Whether there; are other syntactic criteria that further disam­biguate between the three readings also depends on the structural description assigned to the focus particle use. There are suggestions of analysing focus adverbs as syntactic co-constituents of their foci, and there are suggestions for analysing them only as co-constituents of the verb or its pro­jections (see (Hay85), (Hay88), (,lac89), (Jac.84), (KÖH91) among others for a discussion). We have nothing .spécifie, to say about this here. We just note that, under the common assumption that the vorfeld in Gorman introduces at most one con­stituent and under the ensuing assumption that focus adverbs modify their foci, in sentences like (3), <i>erst </i>must be interpreted as focus adverb. (,'i) <i>Nrst eleu Uriel' gab Peter Maria.</i></p><p>(Peter only handed the letter to Maria.)</p><p>As concerns the FS-reading, we add that, provided it is syntactically licensed, this reading is strongly supported if the sentence <b>S2 </b>following the cre­sentence SI contains an adverb of temporal succe-siou (like <i>dann/then, danach/'after this </i>etc.) that modifies a verbal projection of similar tense and information structure as the ens<footnote anchor="1"/>/-argument. This latter heuristics is expensive however, in that it checks extra-sentential information. The follow­ing criteria avoid this.</p></subsection><subsection number="3.2" title="The Focus-Background Criterion"><p>If the assumption of section 2.2 is true that in the EPA-scenario the background event type is tested for specific realizations, it is natural to think of this scenario to be reasonably conceptualized ordy if the background event type merits testing. This is not the case if there is no background event type at all (i.e. <i>\e.</i><i>BAC(])ItSe) </i>is the most general event predicate). There is no background event typo if the entire argument of <i>erst </i>- the verb or a verbal projection - is in focus, or, though not in focus, the verb does not carry enough substance in order to provide an (went type: this is the case; for the copula without the predicative complement. Instead of technically working out the criterion, we content ourselves with some motivating exam­ples which are critical in this respect. In order to avoid interfering effects from the syntactic struc­ture that might complicate matters with regard to determine the scope of <i>erst, </i>we only list examples with verb final position. In (4), the parentheses mark the argument of <i>erst, </i>the brackets annotated by F the focus element from which the semantic focus constituent is developed. As an example, (4.a) and (4.b) present their resulting structured event types. We omit this rather canonical struc­turing for the other examples. (4) <i>Petra war überrascht, weil</i></p><p>(Petra was surprised because) <i>a) Peter erst (in [Stuttgart]war)</i></p><p><b><u>a Stuttgart </u></b><b><i>i </i></b><b>:<u>[</u></b><b><u> </u></b><b><u>i</u></b><b><u> </u></b><b><u>n</u></b><b><u> </u></b><u>(</u> <b>p</b><b> </b><b><u>c</u></b><b><u> </u></b><b><u>t</u></b><b><u> </u></b><b><u>e</u></b><b><u> </u></b><b><u>r,</u></b><b><u> </u></b><b><u>s</u></b><b><u> </u></b><b><u>t</u></b><b><u> </u></b><b><u>u</u></b><b><u> </u></b><b><u>11</u></b><b><u> </u></b><b><u>g</u></b><b><u> </u></b><b><u>a</u></b><b><u> </u></b><b><u>i<footnote anchor="7"/>^"</u>]</b></p><doubt alpha="42.9" length="7" tooSmall="False" monospace="0.0">*(EPA )</doubt><p><i>b) Peter erst (in [Stuttgart]],- anwesend war)</i></p><doubt alpha="65.0" length="20" tooSmall="False" monospace="0.0">~ns~TP     îtuttgart</doubt><p><b>s:<u>f  </u></b><b><u>Aliwc</u>s<u>endfpetcr) </u></b><b><u>~|</u>      in(s</b><b>,Ätuttgai </b><b>t )</b></p><doubt alpha="100.0" length="1" tooSmall="False" monospace="0.0">A</doubt><doubt alpha="60.0" length="5" tooSmall="False" monospace="0.0">(PPA)</doubt><p>(being in Stuttgart/ being present in Stuttgart)</p><doubt alpha="37.1" length="35" tooSmall="False" monospace="0.0">c) es erst ( [12.00],,- war) *(EPA)</doubt><doubt alpha="62.0" length="92" tooSmall="False" monospace="0.0">d) es erst (in [Stuttgart]],- 12.00 war) (EPA)(being12o'clock / being12o'clock in Stuttgart)</doubt><doubt alpha="66.1" length="109" tooSmall="False" monospace="0.0">c) Peter erst ([arbeitete]]- ) *(EVA) 1) Peter erst (in [Stuttgart]]- arbeitete)) (EPA)(working in Stuttgart)</doubt><p>The indications (EPA) and *(EPA) mean that one can conceive contexts that, allow for EPA or that one can not. Without further comment, we think that the criterion is confirmed by the data.</p><p>I'ocus-Background-criterion: The ÈPA-reading is acceptable only if the scope of <i>erst </i>is structured into focus and background in such a way that the background is a specific event type.</p></subsection><subsection number="3.3" title="The Temporal Location Criterion"><p>The R-reading presupposes a sequence of events (conceptualized as a plan or an expectation about the ongoing of the world) and it assumes that, from the perspective of the contextual perspective time, a part of the sequence is realized, according to the ordering of the plan or expectation. The reported event refers to the event of the presuppo­sition line that marks the boundary between the instantiated and the non-instantiated event con cepts, and it does this in right the same way as definite descriptions do with respect to their an ­tecedents. Now, if this is true and if the event description contains a temporal location m the focus, this information cannot be used attribu­tively, because if contributes to the antecedent description and to the distinction of this antecedent from its alternatives.<page local="5"/> Because of this setting, it acts as a restriction on the referring expression that helps to pick up the right antecedent from the presupposition line. This means that, against the background of the presupposition, this in­formation is not new. We add that nothing of the er.s/-argument is new information against this background. New is the information about the progress of the instantiation of the presupposed event concepts. Rut then, stating that an event of the corresponding antecedent type indeed was realized (the assertional impact of the R-reading), and stating that it occurred at a time as was ex­pected (consequence of the specific description of 'antecedent' and 'anaphor'), and simultaneously insinuating that it could have been realized earlier (presuppositional structure of the R-reading sup­ported by implicature) results in a contradiction. This, to our opinion, seems to be the explanation of why the R-reading is not possible in case the description in the scope of <i>erst </i>comes with a tem­poral location in the focus. Compare the following examples to this end.</p><doubt alpha="0.0" length="4" tooSmall="False" monospace="0.0">3 37</doubt><p>(5) Petra <i>war überrascht, weil</i> (5) confirms what we have said so far. Note, by the way, that the features of the Focus-Background-criterion arc not characteristic of the R-reading.</p><doubt alpha="64.1" length="39" tooSmall="False" monospace="0.0">a) Peter erst (in[Stuttgart]/.'war) (R)</doubt><doubt alpha="60.4" length="48" tooSmall="False" monospace="0.0">b) Peter erst (urn [12.00]Fin Stuttgart war)*(R)</doubt><p>What about temporal locations in the back­ground part? At first glance, it seems that what we have said above applies to this case also. How­ever, there are some (relatively marginal) cases that possibly contradict to this assumption. The following example (6) is an instance of this:</p><doubt alpha="64.2" length="67" tooSmall="False" monospace="0.0">(6)...weil Peter erst (in [München];.' um 3 ein Bier getrunken hat)</doubt><p>(because only in Munich, Peter drank a beer at three (so far))</p><p>In a context that continues this information, for instance, by <i>und noch nicht in Köln (am nächsten lag) um 3 / and not yet in Cologne (the next day) at 3 </i>the R-reading seems acceptable. Because of the granularity of the presuppositional event se­quence that develops from the presupposition con­struction in such cases - in (6), the iteration must satisfy to a one-day-rhythm at least- the temporal adjunct cannot truly act as a restrictive referen­tial constraint, and because of what we have said above about novelty, it is not the best attributive information also. This may explain why the ex­ample is felt to be a bit odd. The decisive feature, however, why the above argumentation for the in­compatibility of the R-reading and the presence of temporal localizations does not go through, is the fact that the background temporal localization does not uniquely fix the occurrence time of the event with regard to the time frame of the presup­posed plan or expectation. This, of course, is so, only if the localizing predicate allows for multiple (periodic) instantiation. (Times of day allow for this, also adjuncts like <i>after lunch </i>etc.).</p><p>We stress that what we have said relates to temporal adjuncts <b>in the scope of </b><i>erst. </i>The following (7.a) allows for the R-reading, because the most natural analysis gives wide scope to the temporal adjunct, i.e. the sentence is analysed like (7.b), where clearly, the adjunct serves to localize the temporal perspective.</p><p>(7) <i>a) Erst in München war er gestern.</i></p><p><i>b) weil er gestern erst in München war. </i>(yesterday being in Munich)</p><p>We have considered only temporal adjuncts so far. The alternative temporal localization that oc­curs in the scope of <i>erst </i>is the construction 'cop­ula + predicative temporal expression', which ac­cepts the R-reading. Examples are (4.c) and (4.d). We skip the complete explanatory argument here and just say that (grosso modo) the function of the copula construction is to synchronize calendar knowledge (also information about different calen­dars: R-reading of (4.d)) with the actual avail­able perspective times, whereas the function of the temporal adjunct is to relate the described event to some predefined time. We take it for granted, that this difference is the reason why the decisive conflict that we mentioned further above only arises if the temporal location is introduced by modification, i.e. in case it is introduced by an adjunct.</p><p>We retain the following criterion: Temporal-Location-criterion: The R-reading is acceptable only if the focus con­stituent of the scope of <i>erst </i>does not contribute a temporal localization (by modification of a basic event type). In addition, the scope must not con­tain an adjunct - focused or not - that is a uniquely referring temporal location (like <i>yesterday).</i></p></subsection><subsection number="3.4" title="The Entailment Criterion"><p>Compare the following examples:</p><doubt alpha="36.4" length="11" tooSmall="False" monospace="0.0">(8) ...weil</doubt><p><i>a) Tomba sich erst (an (1er [Streitalmhütte ]p</i> <i>disqualifizierte).</i><i></i></p><doubt alpha="66.7" length="45" tooSmall="False" monospace="0.0">(T. disqualified himself at the S.)*(R),(EPA)</doubt><p><i>b) erst ( [drei </i><i>]f</i><i> Unterschriften genügten). </i>(three signatures were sufficient.) <i>*(R),(EPA).</i></p><p><i>c) Peter erst ( [vier </i><i>]p</i><i> Angestellte kannte).</i></p><doubt alpha="61.1" length="36" tooSmall="False" monospace="0.0">(P. knew four employees.)(R), *(EPA)</doubt><p>(8.a) cannot have the R-reading. Why? The in­telligent construction of the presuppositional se­quence of events for the R-reading outputs a num­ber of disqualification events that are located at particular places of the Ilahnenkamm downhill race in Kitzbiihel. What is specific with this se­quence is the fact that the postconditions df any of these events are such that the preconditions of the successive events never can hold. Therefore such a sequence can never be a reasonable plan or a reasonable expectation about a downhill race.<page local="6"/> I.e. a constitutive element of the It-reading cannot, be constructed in this case. In (8.b) the descrip­tions of subsequent events (states in this case) of the presuppositional line are more general predi­cates than the description of the predecessors, i.e. each such sequence collapses in its first element in essence. This cannot tridy be called a sequence. With (8.c), we encounter, so to speak, the sym­metric picture with regard to the EPA-reading: <i>Knowing n employees </i>entails the previously tested <i>knowing n-1 employees. </i>The expectation of some proposition p to be true in a specific situation sncannot be falsified, in case the validity of a partic­ular proposition q in the subsequent test situation sn+| confirms the validity of p.</p><doubt alpha="0.0" length="3" tooSmall="False" monospace="0.0">338</doubt><p>We retain the following criterion: Kntailm<u>ent-criterion</u>:</p><p>Kor the It-reading to be acceptable, first, the post­conditions of each event of the presuppositional line must be compatible with the preconditions of the successor and second, (at least for homo­geneous descriptions) the description of an event must not subsume the description of the following events.</p><p>For the EPA-reading to be acceptable, (at least for homogeneous descriptions) the; event descrip­tion tested at a situation must not subsume the previously tested event description, 'there are refinements of this criterion that we must omit here.</p></subsection></section><section number="4" title="Final Remarks"><p>The four criteria of the last section can be used in order to exclude readings of <i>ersl. </i>It is only the last (entailment) criterion that necessitates some economic semantic inferencing. The others corre­spond more or less to a structural lookup. Using the convincing structural inferdependencies that (Löb89) shows for a subset of the German focus adverbs containing <i>erst, </i>the generalization of the approach suggested here to other ambiguous ad­verbs seems very promising.</p></section><references><p>J. Bayer. Adjazenz und Kettenbildung. Be­merkungen zur Syntax der deutschen Grad­partikeln, 1985. (ms.) Max-Planck-lnstilut für Psycholinguistik.</p><p>,1. Bayer. Rightward movement and the syn­tax of ([nantilicational particles in German. In V. Rosen, editor, <i>Papers from the Tenth Scan­dinavian Conference of Linguistics 1, </i>Bergen, Norway, 1988.</p><p>Peter I. Blok and Kurt Kberlc. What is the alter­native. In Peter Bosch and Rob van der Saiuif, editors, <i>Focus and Natural Language Process­ing, Proceedings of the Interdisciplinary Con-</i> <i>ference in Celebration of the 10th Anniversary of the </i>Journal of Semantics. IBM, Heidelberg, 1995.</p><p>J. Bos, E.Mastcnbroek. S.McGlashan, S.Millies, and M.Pinkal. The Verbmobil semantic formal­ism. VM report 6, Universität des Saarlandes, 1994.</p><p>Kurt Eberle. On representing the temporal struc­ture of a natural language text. In <i>Proceedings of Coling'JS, </i>Nantes, 1992.</p><p>Kurt Fberle. Zu einer Semantik für Dialogverste hen und Übersetzung. Verbmobil-Report 83, üniversitaet Stuttgart, 1995.</p><p>Jakob Hoepelman and Christian Rohrer. Re­marks on <i>noch </i>and <i>schon </i>in German. <i>Syntax and Semantics, </i>14:103--126, 1981.</p><p>J. Jacobs. The syntax of bound focus in German. <i>Croninyer Arbeiten zur Germanistischen Lin­guistik,'</i><i>2ryA72 ■ - </i>200, 1984.</p><p>J. Jacobs. <i>Fokus und Skalen. Zur Syntax und Semantik der Cradparlikeln im Deutschen. </i>Niemeyer, Tübingen, 1989.</p><p>Hans Kam]). A theory of truth and semantic rep­resentation. In J.A.G. Croenendijk, T.M.V. Janssen, and M.B.J. Stokhof, editors, <i>Formal Methods in the Study of Language. </i>Mathemat­ical Centre Tract, Amsterdam, 1981.</p><p>Hans Kamp. Some elements of a DRT-based the­ory of the representation of mental states and verbal communication, (ins.), IMS, Universität Stuttgart, 1995.</p><p>Ekkehard König. A semantic analysis of German 'erst'. In Rainer Bäuerle, I). Egli, and Arnim von Stechow, editors, <i>Semantics from Differ­ent Points of View, </i>pages 148 160. Springer, Berlin,Heidelberg,New York,Tokyo, 1979.</p><p>Ekkehard König. <i>The Meaning of Focus Parti­cles: A Comparative Perspective. </i>Routledge, London, New York, 1991.</p><p>Stephen C. Levinson. <i>Pragmatics. </i>Cambridge University Press, Cambridge, New York, 1983.</p><p>Sebastian böbner. Schon - erst -noch: An inte­grated analysis. In Werner Abraham, editor, <i>Discourse Particles, </i>pages 85 140. Niemeyer, Tübingen, 1989.</p><p>Mats E. I tooth. <i>Association with Focus. </i>Phi) thesis, University of Massachusetts at Amherst, 1985.</p><p>Mats E.  Ilooth.   A theory of focus interpreta­tion.    <i>Natural Language Semantics, </i>l(l):75 I 17, 1992.</p><p>Rob van der Sandt. Presupposition projection as anaphora resolution. <i>Journal of Semantics, </i>9(4), 1992.</p><doubt alpha="0.0" length="3" tooSmall="False" monospace="0.0">339</doubt></references></body></article>