Paper: Handling Biographical Questions With Implicature

ACL ID H05-1075
Title Handling Biographical Questions With Implicature
Venue Conference on Empirical Methods in Natural Language Processing
Session Main Conference
Year 2005

Traditional question answering systems adopt the following framework: parsing questions, searching for relevant docu- ments, and identifying/generating an- swers. However, this framework does not work well for questions with hidden as- sumptions and implicatures. In this paper, we describe a novel idea, a cascading guidance strategy, which can not only identify potential traps in questions but further guide the answer extraction pro- cedure by recognizing whether there are multiple answers for a question. This is the first attempt to solve implicature prob- lem for complex QA in a cascading fash- ion using N-gram language models as features. We here investigate questions with implicatures related to biography facts in a web-based QA system, Power- Bio. We compare the performances of Decisi...