Annotating event mentions in text with modality, focus, and source information

Suguru Matsuyoshi, Megumi Eguchi, Chitose Sao, Koji Murakami, Kentaro Inui, Yuji Matsumoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Citations (Scopus)

Abstract

Many natural language processing tasks, including information extraction, question answering and recognizing textual entailment, require analysis of the polarity, focus of polarity, tense, aspect, mood and source of the event mentions in a text in addition to its predicate-argument structure analysis. We refer to modality, polarity and other associated information as extended modality. In this paper, we propose a new annotation scheme for representing the extended modality of event mentions in a sentence. Our extended modality consists of the following seven components: Source, Time, Conditional, Primary modality type, Actuality, Evaluation and Focus. We reviewed the literature about extended modality in Linguistics and Natural Language Processing (NLP) and defined appropriate labels of each component. In the proposed annotation scheme, information of extended modality of an event mention is summarized at the core predicate of the event mention for immediate use in NLP applications. We also report on the current progress of our manual annotation of a Japanese corpus of about 50, 000 event mentions, showing a reasonably high ratio of inter-annotator agreement.

Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Language Resources and Evaluation, LREC 2010
EditorsDaniel Tapias, Irene Russo, Olivier Hamon, Stelios Piperidis, Nicoletta Calzolari, Khalid Choukri, Joseph Mariani, Helene Mazo, Bente Maegaard, Jan Odijk, Mike Rosner
PublisherEuropean Language Resources Association (ELRA)
Pages1456-1463
Number of pages8
ISBN (Electronic)2951740867, 9782951740860
Publication statusPublished - 2010
Event7th International Conference on Language Resources and Evaluation, LREC 2010 - Valletta, Malta
Duration: 2010 May 172010 May 23

Publication series

NameProceedings of the 7th International Conference on Language Resources and Evaluation, LREC 2010

Other

Other7th International Conference on Language Resources and Evaluation, LREC 2010
CountryMalta
CityValletta
Period10/5/1710/5/23

ASJC Scopus subject areas

  • Education
  • Library and Information Sciences
  • Linguistics and Language
  • Language and Linguistics

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