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A Definitional Question Answering System Based on Phrase Extraction Using Syntactic Patterns
Kyoung-Soo HAN Young-In SONG Sang-Bum KIM Hae-Chang RIM
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2006/04/01
Online ISSN: 1745-1361
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Natural Language Processing
definitional question answering, phrase extraction,
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We propose a definitional question answering system that extracts phrases using syntactic patterns which are easily constructed manually and can reduce the coverage problem. Experimental results show that our phrase extraction system outperforms a sentence extraction system, especially for selecting concise answers, in terms of recall and precision, and indicate that the proper text unit of answer candidates and the final answer has a significant effect on the system performance.