Effects of Structural Matching and Paraphrasing in Question Answering

Tetsuro TAKAHASHI  Kozo NAWATA  Kentaro INUI  Yuji MATSUMOTO  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E86-D   No.9   pp.1677-1685
Publication Date: 2003/09/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Issue on Text Processing for Information Access)
Category: 
Keyword: 
question answering,  structural matching,  paraphrasing,  paraphrase space,  

Full Text: PDF>>
Buy this Article




Summary: 
In this paper, we propose an answer seeking algorithm for question answering that integrates structural matching and paraphrasing, and report the results of our empirical evaluation conducted with the aim of examining effects of incorporating those two components. According to the results, the contribution of structural matching and paraphrasing was not so large as expected. Based on error analysis, we conclude that structural matching-based approaches to answer seeking require technologies for (a) coreference resolution, (b) processing of parse forests instead of parse trees, and (c) large-scale acquisition of paraphrase patterns.