ETRI Journal

  • 제25권4호
  • /
  • Pages.219-230
  • /
  • 2003
  • /
  • 1225-6463(pISSN)
  • /
  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
권호 표지

English Syntactic Disambiguation Using Parser's Ambiguity Type Information

  • Lee, Jae-Won (School of Computer Science and Information, Sungshin Women's University) ;
  • Kim, Sung-Dong (Department of Computer System Engineering, Hansung University) ;
  • Chae, Jin-Seok (Department of Computer Science and Engineering, University of Incheon) ;
  • Lee, Jong-Woo (Department of Computer Engineering, Kwangwoon University) ;
  • Kim, Do-Hyung (School of Computer Science and Information, Sungshin Women's University)
  • 투고 : 2002.05.16
  • 발행 : 2003.06.30
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초록

This paper describes a rule-based approach for syntactic disambiguation used by the English sentence parser in E-TRAN 2001, an English-Korean machine translation system. We propose Parser's Ambiguity Type Information (PATI) to automatically identify the types of ambiguities observed in competing candidate trees produced by the parser and synthesize the types into a formal representation. PATI provides an efficient way of encoding knowledge into grammar rules and calculating rule preference scores from a relatively small training corpus. In the overall scoring scheme for sorting the candidate trees, the rule preference scores are combined with other preference functions that are based on statistical information. We compare the enhanced grammar with the initial one in terms of the amount of ambiguity. The experimental results show that the rule preference scores could significantly increase the accuracy of ambiguity resolution.

키워드

참고문헌

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