TAILIEUCHUNG - Báo cáo khoa học: "Resolving Ellipsis in Clarification"

We offer a computational analysis of the resolution of ellipsis in certain cases of dialogue clarification. We show that this goes beyond standard techniques used in anaphora and ellipsis resolution and requires operations on highly structured, linguistically heterogeneous representations. We characterize these operations and the representations on which they operate. We offer an analysis couched in a version of Head-Driven Phrase Structure Grammar combined with a theory of information states (IS) in dialogue. . | Resolving Ellipsis in Clarification Jonathan Ginzburg Dept of Computer Science King s College London The Strand London WC2R 2LS UK ginzburg@ Robin Cooper Dept of Linguistics Goteborg University Box 200 405 30 Goteborg Sweden cooper@ Abstract We offer a computational analysis of the resolution of ellipsis in certain cases of dialogue clarification. We show that this goes beyond standard techniques used in anaphora and ellipsis resolution and requires operations on highly structured linguistically heterogeneous representations. We characterize these operations and the representations on which they operate. We offer an analysis couched in a version of Head-Driven Phrase Structure Grammar combined with a theory of information states IS in dialogue. We sketch an algorithm for the process of utterance integration in ISs which leads to grounding or clarification. 1 Introduction Clarification ellipsis CE nonsentential elliptical queries such as 1a i ii are commonplace in human conversation. Two common read-ings understandings of CE are exemplified in 1b c the clausal reading is commonly used simply to confirm the content of a particular subutterance. The main function of the constituent reading is to elicit an alternative description or osten-sion to the content referent or predicate etc intended by the original speaker of the reprised subutterance. 1 a. A Did Bo finagle a raise B i Bo ii finagle b. Clausal reading Are you asking if BO of all people finagled a raise Bo FINAGLED a raise of all actions c. Constituent reading Who is Bo What does it mean to finagle The issue of whether CE involves an ambiguity or is simply vague is an important 2 Clearly pragmatic reasoning plays an important role in understanding CEs. Some considerations do nonetheless favour the existence of an ambiguity. First the BNC provides numerous examples of misunderstandings concerning CE inter-pretation 3 where a speaker intends one reading is misunderstood and clarifies

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