A Multi-Strategy and Multi-Source Approach to Question Answering.

Jennifer Chu-Carroll John M. Prager Christopher A. Welty Krzysztof Czuba David A. Ferrucci A Multi-Strategy and Multi-Source Approach to Question Answering. 2002 TREC http://trec.nist.gov/pubs/trec11/papers/ibm.prager.pdf db/conf/trec/trec2002.html#Chu-CarrollPWCF02