TAILIEUCHUNG - Báo cáo khoa học: " Pointing to Events"

Although there is an extensive body of research concerned with anaphora resolution (. (Fox, 1987; Grosz et al., 1995)), event anaphora has been widely neglected. This paper describes the results of an empirical study regarding event reference. The experiment investigated event anaphora in narrative discourse via a sentence completion task. The results of the experiment suggest that the discourse structure established by an explanation or elaboration relation has an influence on whether the last mentioned event, previously mentioned events or a complex event is preferably referred to. . | Proceedings of EACL 99 Pointing to Events Frank Schilder Department for Informatics University of Hamburg Vogt-Kolln-Str. 30 22527 Hamburg Germany schilder@ 1 Introduction Although there is an extensive body of research concerned with anaphora resolution . Fox 1987 Grosz et al. 1995 event anaphora has been widely neglected. This paper describes the results of an empirical study regarding event reference. The experiment investigated event anaphora in narrative discourse via a sentence completion task. The results of the experiment suggest that the discourse structure established by an explanation or elaboration relation has an influence on whether the last mentioned event previously mentioned events or a complex event is preferably referred to. First a short introduction is given to the observation that reference by the demonstrative pronoun this can only be done to antecedents mentioned in segments at the right frontier of the discourse structure tree Webber 1991 . Second although the right frontier restriction is generally agreed on by researchers it is still unclear what kind of information is actually stored on higher levels of the discourse tree. Segmented Discourse Structure Theory SDRT is introduced Asher 1993 and the predictions of this theory are discussed regarding event anaphora for two example discourses. These predictions are also compared with the predictions according to Webber 1991 . Neither theory adequately explains the results of the current experiment. Thus the presentation concludes with an outline of a proposed computational theory. 2 Background Generally speaking events are referred to by pronominal expressions such as that or this 1 1 a John hated snakes b His neighbour had kept snakes c and he had been bit The sequence is a slightly altered example taken from Webber 1991 . ten by a snake once d This was unfortunate. The pronoun this in Id may refer to the entire situation described by la through 1c . But there are

• Báo cáo khoa học
• Pointing to Events
• Frank Schilder
• Workshops
• scientific reports
• model language
• process natural language
• Dialog Control
• Natural Language System
• Dialog Control in a Natural Language System
• Expanding the Horizons
• Natural Language Interfaces
• Phil Hayes
• PROSPECTS OR PRACTICAL
• NATURAL LANGUAGE SYSTEMS
• NATURAL LANGUAGE
• INTERACTION WITH MACHINES
• Long Papers
• COMPUTER INTEBFACE DESIGN MURRAY TUROFF DEPARTMENT OF COMPUTER
• IiVFORMATION SCIENCE IIEW JERSEY INSTITUTE OF TECHNOLOGY
• EVALUATION OF NATURAL LANGUAGE
• INTERFACES TO DATABASE SYSTEMS
• A PANEL DISCUSSION
• database query system
• J
• Norwood Crout
• INTERFACES TO DATA BASE SYSTEMS
• Bozena Henisz
• INTERPRETING NATURAL LANGUAGE
• DATABASE UPDATES
• S
• Jermld Kaplan Jim David
• TRANSPORTABLE NATURAL LANGUAGE
• INTERFACES TO DATABASES
• Gary G
• Hendrlx and William H
• Lewis
• DATABASES THEORETICAL
• TECHNICAL ISSUES
• TRANSPORTABLE NATURAL LANGUAGE INTERFACES
• PROBLEMS AND TECHNIQUES
• Barbara J
• Grosz
• THEORETICAL TECHNICAL ISSUES
• NATURAL LANGUAGE ACCESS TO DATABASES
• R
• Petrick
• Domain Independent
• Database Access Systems
• ISSUES IN NATURAL LANGUAGE
• ACCESS TO DATABASES
• A LOGIC PROGRAMMING PERSPECTIVE
• Sharon C
• Salveter David Maier
• PLANNING NATURAL LANGUAGE
• EXPRESSIONS REFERRING
• Douglas E
• Appelt
• THE TEXT SYSTEM
• NATURAL LANGUAGE GENERATION
• Kathleen R
• M
• MENTING A DATABASE
• KNOWLEDGE REPRESENTATION
• THE KEY TO THE SELECTION PROBLEM
• E
• Jeffrey Conklin David D
• McDonald
• A KNOWLEDGE ENGINEERING
• NATURAL LANGUAGE UNDERSTANDING
• Stuart C
• Shapiro
• NATURAL LANGUAGE TEXTS
• NECESSARILY GRAMMATICAL
• EVEN COMPLETE
• UNGRAMHATICALITY
• EXTRA GRAMMATICALITY
• NATURAL LANGUAGE UNDERSTANDING SYSTEMS
• Taxonomy
• Descriptions
• Individuals in Natural
• Language Understanding
• The Use of Ooject Special Knowledge
• Natural Language Processing
• Mark H
• Bursteln