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A Question Answering (QA) system must provide concise answers from large collections of documents to questions stated by the user in natural language. However, although many QA systems for open domain exist, its adaptation for restricted domains (such as those of healthcare, agri culture, transportation, or science) is a far from trivial task. The principal problem is that domain experts ask more precise questions (and expect more precise answers), including specific terminology, and this isdblp:journals/acj/VilaMF11 fatcat:syvwx4w7b5cqxdnr2mv4ptp6re