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This paper hypothesizes that transfer-based machine translation systems can be improved by encoding information structure in both the source and target grammars, and preserving information structure in the transfer stage. We explore how information structure can be represented within the HPSG/MRS formalism (Pollard and Sag, 1994; Copestake et al., 2005) and how it can help refine multilingual MT. Building upon that framework, we provide a sample translation between English and Japanese and check the feasibility of the proposals in small-scale translation systems built with the HPSG/MRS-based LOGON MT infrastructure (Oepen et al., 2007). Our experiment shows the information structure-based MT system that we propose in this paper reduces the number of translations 75.71% for Japanese and 80.23% for Korean. The dramatic reductions in the number of translations is expected to make a contribution to our HPSG/MRS-based MT in terms of latency as well as accuracy.
In this paper I argue that there are three distinct constructions in Modern German in which a 'topic constituent' is detached to the left: (left-)dislocated topic ('left dislocation'), (left-)attached topic ('mixed left dislocation'), and (left-)hanging topic ('hanging topic'). Presupposing the framework of Integrational Linguistics, I provide syntactic and semantic analyses for them. In particular, I propose that these constructions involve the syntactic function (syntactic) topic, which relates the topic constituent to the remaining part of the sentence. Dislocated and attached topic constituents function in addition as a strong or weak (syntactic) antecedent of some resumptive 'd-pronoun' form.
Dislocated topic, attached topic, and hanging topic are in turn contrasted with 'free topics'. Being sentential units of their own, the latter are syntactically unconnected to the following sentence. In particular, they are not topic constituents.
Current analyses of specificity are unable to provide an explanatory account for why specific and nonspecific uses of indefinites are available. While Abusch (1994), Reinhart (1997), and Kratzer (1998) provide successful mechanisms for deriving specific readings, they do not provide a fundamental explanation for the availability of this mechanism. This is due to the fact that specific indefinites are treated as involving an interpretive component or procedure unique to themselves: storage (Abusch) or choice function (Reinhart and Kratzer), for example. It would be preferable if specific indefinites could be understood as deriving from the use of independently motivated meaning components and interpretive mechanisms.
Here I will pursue the idea, building on Portner & Yabushita (1998), that specificity has to do with the indefinite's interaction with a topical domain (note similarities with the proposals of Enç 1991, Cresti 1995, and Schwarzschild 2000). In this conception, specificity is a matter of degree: the narrower the topical domain, the more specific the indefinite. More precisely, sentences containing specific indefinites will be understood as involving ordinary existential quantification in combination with a topical domain function.
In this paper topic and focus effects at both left and right periphery are argued to be epiphenomena of general properties of tree growth. We incorporate Korean into this account as a prototypical verb-final language, and show how long- and short-distance scrambling form part of this general picture. Multiple long-distance scrambling effects emerge as a consequence of the feeding relationship between different forms of structural under-specification. We also show how the array of effects at the right periphery, in both verb-final and other language-types, can also be explained with the same concepts of tree growth. In particular the Right Roof Constraint, a well-known but little understood constraint, is an immediate consequence of compositionality constraints as articulated in this system.
Buli is an Oti-Volta tone language spoken in Northern Ghana. This paper outlines the basic features of its tonal system and explores whether and in which way pitch respectively phonemic tone is approached as a means to indicate the pragmatic category of focus. Pursued are cases with focus-related surface tone changes as well as cases where pitch could help to disambiguate between broad and narrow foci. It is argued that focus is not consistently encoded by pitch or tone. Parallel findings for the closely related languages Kopen o (phonetic symbol)nni and Dagbani suggest that the apparent lack of significant prosodic focus signals in Buli might pertain to a larger group of tonal languages of the Gur family.
This talk concerns the copula system in Buli, a Ghanaian language which has also been attested in Bahia (Rodrigues 1935, Zwernemann 1968). Special focus will be put on the categorization of two copula-reminiscent elements for which I will propose a discoursepragmatic analysis.
The paper investigates a complex word order phenomenon in German and the interaction of syntax and information structure it exemplifies: the occurrence of subjects as part of a fronted non-finite constituent and particularly the so-called definiteness effect excluding (many) definite subjects from this position. We explore the connection between focus projection and the partial fronting cases and show that it is the subject of those verbs which allow their subject to be the focus exponent that can be included as part of a fronted verbal constituent. In combination with the observation by Webelhuth (1990) that fronted verbal constituents need to be focused, this provides a natural explanation of the definiteness effect in terms of the information structure requirements in these sentences. Interestingly, the generally ignored exceptions to the definiteness effect are predicted by our analysis; we show that they involve definite noun phrases which can bear focus, which allows them to be part of a fronted verbal constituent. Finally, building on the integrated grammatical architecture provided in De Kuthy (2002), we formulate an HPSG theory which captures the interaction of constraints from syntax, information structure and intonation.
This paper investigates a particular word order phenomenon in German, the occurrence of discontinuous NPs (which we refer to as the NP-PP split construction) in order to probe the division of labor between the syntactic analysis and discourse constraints on this construction. We argue that some of the factors which previous literature has tried to explain in terms of syntactic restrictions are in fact derivable from discourse factors. Building on these insights, we show how an information structure component can be integrated into an HPSG account of the phenomenon.
The present investigation steps back to the claims of the 1990s by assuming that there is a functional opposition in the use of P- and D-PRO which affects the status of the pronoun's referent in the mental model of the discourse. We interpret the earlier findings as an indication of an information structural difference which is specifically relevant on the discourse level. The question we address here is twofold. Firstly, we ask whether the assumed opposition in the information status of P- and D-PRO referents has consequences on referent continuation in the ongoing discourse. So far, the effects of P- vs. D-PRO use were determined concerning the status of the pronoun referent in the actual sequence of discourse, i.e. they were determined by a judgement on the salience or the topic/focus status of the pronominal DP. As far as we can see, this determination has not been operationalized further. Since there are contexts in which both P- and D-PRO would fit in with only a feeling of a difference but without clear-cut exclusiveness, the opposition is empirically not well validated. If we could show that there are effects of type of pronoun on the ongoing discourse this would, in our view, provide the lacking empirical validation. Secondly, we ask whether there are effects of the narrator's point of view on P- and D-PRO use. The idea behind this question is that the way of information unfolding in discourse depends on the speaker. S/he decides which pieces of information come next, what is foreground and what is background information. If type of pronoun choice is related to the processes of discourse organization by the speaker – via fore- and backgrounding of information – and if internal or external location of the narrator's point of view influences the organization strategies of the speaker/narrator this might have an ffect on the use of P- and D-PRO.