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Question answering (QA) aims at retrieving precise information from a large collection of documents. Different techniques can be used to find relevant information, and to compare these techniques, it is important to evaluate QA systems. The objective of an Answer Validation task is thus to judge the correctness of an answer returned by a QA system for a question, according to the text snippet given to support it. We participated in such a task in 2006. In this article, we present our strategydoi:10.1109/ictai.2007.156 dblp:conf/ictai/LigozatGVRG07 fatcat:3j5og47bljgevk2xgdujlrcvre