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This paper describes the architecture and implementation of Tianwang QA system2006, which works for the TREC QA Main task this year. ... And such query generation algorithm can be benefit from both Frequent Asked Questions on Web and past TREC QA data. ... The reason for this is two-folded: first of all, the knowledge base of Wikipedia contains large quantity of pages, most of which are not useful in this Figure1: Tianwang QA System 2006 infrastructure TREC ...dblp:conf/trec/HeL06 fatcat:itzuonrxfnb2zdh23qa7y472uy