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Experiments with Query Expansion in the RAPOSA (FOX) Question Answering System
2008
Conference and Labs of the Evaluation Forum
In this paper we present the results of applying a statistical query expansion method on the retrieval stage of a QA system for Portuguese (RAPOSA). Our approach involves expanding queries for event-related or action-related factoid questions using a verb thesaurus automatically generated using information extracted from large corpora. We show that our expansion approach improves QA recall when compared with applying expansion based on a simple form of stemming, while simultaneously requiring
dblp:conf/clef/SarmentoTO08a
fatcat:uwj3dkh7g5cend3zfsnab4mx5u