TREC 2002 QA at BBN: Answer Selection and Confidence Estimation.
Jinxi Xu, Ana Licuanan, Jonathan May, Scott L. Miller, Ralph Weischedel · 2002
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 questionanswer 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. 1.