Annotating the Focus of Negation in Japanese Text

Suguru Matsuyoshi, Ryo Otsuki, Fumiyo Fukumoto

Abstract
This paper proposes an annotation scheme for the focus of negation in Japanese text. Negation has its scope and the focus within the scope. The scope of negation is the part of the sentence that is negated; the focus is the part of the scope that is most prominently or explicitly negated. In natural language processing, correct interpretation of negated statements requires precise detection of the focus of negation in the statements. As a foundation for developing a negation focus detector for Japanese, we have annotated textdata of “Rakuten Travel: User review data” and the newspaper subcorpus of the “Balanced Corpus of Contemporary Written Japanese” with labels proposed in our annotation scheme. We report 1,327 negation cues and the foci in the corpora, and present classification of these foci based on syntactic types and semantic types. We also propose a system for detecting the focus of negation in Japanese using 16 heuristic rules and report the performance of the system.
Anthology ID:
L14-1606
Volume:
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)
Month:
May
Year:
2014
Address:
Reykjavik, Iceland
Editors:
Nicoletta Calzolari, Khalid Choukri, Thierry Declerck, Hrafn Loftsson, Bente Maegaard, Joseph Mariani, Asuncion Moreno, Jan Odijk, Stelios Piperidis
Venue:
LREC
SIG:
Publisher:
European Language Resources Association (ELRA)
Note:
Pages:
1743–1750
Language:
URL:
http://www.lrec-conf.org/proceedings/lrec2014/pdf/777_Paper.pdf
DOI:
Bibkey:
Cite (ACL):
Suguru Matsuyoshi, Ryo Otsuki, and Fumiyo Fukumoto. 2014. Annotating the Focus of Negation in Japanese Text. In Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14), pages 1743–1750, Reykjavik, Iceland. European Language Resources Association (ELRA).
Cite (Informal):
Annotating the Focus of Negation in Japanese Text (Matsuyoshi et al., LREC 2014)
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PDF:
http://www.lrec-conf.org/proceedings/lrec2014/pdf/777_Paper.pdf
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