TAILIEUCHUNG - Báo cáo khoa học: "Assessing the Role of Discourse References in Entailment Inference"

Discourse references, notably coreference and bridging, play an important role in many text understanding applications, but their impact on textual entailment is yet to be systematically understood. On the basis of an in-depth analysis of entailment instances, we argue that discourse references have the potential of substantially improving textual entailment recognition, and identify a number of research directions towards this goal. | Assessing the Role of Discourse References in Entailment Inference Shachar Mirkin Ido Dagan Bar-Ilan University Ramat-Gan Israel mirkins dagan @ Sebastian Pado University of Stuttgart Stuttgart Germany pado@ Abstract Discourse references notably coreference and bridging play an important role in many text understanding applications but their impact on textual entailment is yet to be systematically understood. On the basis of an in-depth analysis of entailment instances we argue that discourse references have the potential of substantially improving textual entailment recognition and identify a number of research directions towards this goal. 1 Introduction The detection and resolution of discourse references such as coreference and bridging anaphora play an important role in text understanding applications like question answering and information extraction. There reference resolution is used for the purpose of combining knowledge from multiple sentences. Such knowledge is also important for Textual Entailment TE a generic framework for modeling semantic inference. TE reduces the inference requirements of many text understanding applications to the problem of determining whether the meaning of a given textual assertion termed hypothesis H can be inferred from the meaning of certain text T Dagan et al. 2006 . Consider the following example 1 T Not only had he developed an aversion to the President-1 and politics in general Oswald2 was also a failure with Marina his wife. . Their relationship was supposedly responsible for why he2 killed Kennedy 1. H Oswald killed President Kennedy. The understanding that the second sentence of the text entails the hypothesis draws on two coreference relationships namely that he is Oswald and that the Kennedy in question is President Kennedy. However the utilization of discourse information for such inferences has been so far limited mainly to the substitution of nominal coreferents while many aspects .

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