TREC 2002 QA at BBN: Answer Selection and Confidence Estimation
TREC(2002)
摘要
We focused on two issues: answer selection and confidence estimation. We found that some simple constraints on the candidate answers can improve a pure IR-based technique for answer selection. We also found that a few simple features derived from the question- answer pairs can be used for effective confidence estimation. Our results also confirmed findings by Dumais et al, 2002 that the World-Wide Web is a very useful resource for answering TREC-style factoid questions.
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关键词
world wide web,question answering
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