Using Knowledge to Facilitate Pinpointing of Factoid Answers

E.H. Hovy; U. Hermjakob; Chin-Yew Lin; Deepak Ravichandran

Using Knowledge to Facilitate Pinpointing of Factoid Answers

E.H. Hovy ,
U. Hermjakob ,
Chin-Yew Lin ,
Deepak Ravichandran

19th International Conference on Computational Linguistics (COLING 2002) | August 2002

In order to answer factoid questions, the Webclopedia QA system employs a range of knowledge resources. These include a QA Typology with answer patterns, WordNet, information about typical numerical answer ranges, and semantic relations identified by a robust parser, to filter out likely-looking but wrong candidate answers. This paper describes the knowledge resources and their impact on system performance.