Alignment-based surface patterns for factoid question answering systems

Authors:
Cheng-Lung Sung;Cheng-Wei Lee;Hsu-Chun Yen;Wen-Lian Hsu
Affiliations:
Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan and Institute of Information Science, Academia Sinica, Taipei, Taiwan;Institute of Information Science, Academia Sinica, Taipei, Taiwan;Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan;(Correspd. Tel.: +886 2 27883799 ext. 1804/ Fax: +886 2 27824814/ E-mail: clsung,aska,hsu@iis.sinica.edu.tw/ yen@cc.ee.ntu.edu.tw) Institute of Information Science, Academia Sinica, Taipei, Taiwan
Venue:
Integrated Computer-Aided Engineering - Selected papers from the IEEE Conference on Information Reuse and Integration (IRI), July 13-15, 2008
Year:
2009

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Abstract

We propose an alignment-based surface pattern approach, called ABSP, which integrates semantic information into syntactic patterns for question answering (QA). ABSP employs a new strategy to extract surface patterns from non-segmented passages. It uses the surface patterns to extract important terms from questions, and then constructs the terms' relations from sentences in the corpus. Finally, the relations are used to rank answer candidates. Our experiments show that ABSP is highly accurate, and it can be incorporated into other QA systems that have high coverage. It can also be used in cross-lingual QA systems. The approach is robust and portable to other domains.