Effects of Structural Matching and Paraphrasing in Question Answering

Tetsuro Takahashi, Kozo Nawata, Kentaro Inui, Yuji Matsumoto

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1677-1685
Number of pages9
JournalIEICE Transactions on Information and Systems
Issue number9
Publication statusPublished - 2003 Sept


  • Paraphrase space
  • Paraphrasing
  • Question answering
  • Structural matching


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