Presentation 2001/7/10
N-gram Based Approach for Syntactic Analysis
Nobuo Inui, Yoshiyuki Kotani,
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Abstract(in English) In this paper, we propose a PCFG-based Japanese syntactic analysis using part-of-speech N-gram information. This method uses syntactic rules gathered from bracketed corpora and finds an optimal syntactic tree by calculating the occurrence probability obtained from the frequency information. The proposed grammar regards sequences of part-of-speech as clause markers. In this case, it is necessary to forecast occurrence probabilities of long or unseen clauses. N-gram information is used to estimate them, instead of clause-occurrence probabilities, to cope with this issue. Initial experimental results showed that our method achieved the same performance as the previous methods and provided robust processing of syntactic analysis.
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Keyword(in English) Japanese Syntactic Analysis / N-gram Information / Probabilistic Context-Free Grammar
Paper # NLC2001-22
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Committee NLC
Conference Date 2001/7/10(1days)
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Registration To Natural Language Understanding and Models of Communication (NLC)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) N-gram Based Approach for Syntactic Analysis
Sub Title (in English)
Keyword(1) Japanese Syntactic Analysis
Keyword(2) N-gram Information
Keyword(3) Probabilistic Context-Free Grammar
1st Author's Name Nobuo Inui
1st Author's Affiliation Dept. of Computer Science, Tokyo Univ. of Agri. and Tech.()
2nd Author's Name Yoshiyuki Kotani
2nd Author's Affiliation Dept. of Computer Science, Tokyo Univ. of Agri. and Tech.
Date 2001/7/10
Paper # NLC2001-22
Volume (vol) vol.101
Number (no) 190
Page pp.pp.-
#Pages 6
Date of Issue