UniGe at CLEF 2009 Robust WSD Task (abstract only)
نویسندگان
چکیده
For our second participation to the Robust Word Sense Disambiguation (WSD) Task, we focused on performing a deep analysis of the ambiguity issue in the field of Information Retrieval. During the 2008 edition, we noted that although the WSD corpus allowed lifting lexical ambiguities, our results based on the corpus' WSD were not clearly better than those based on words only. We showed that lexical ambiguity was an issue only when queries included only one or possibly two words, but whenever the query was "longer", its words created a context that implicitly decreased lexical ambiguities. We thought we had a domain ambiguity problem, i.e. the retrieved documents did contain some of the query’s words but they turned out to be irrelevant. Thus, we tried to expand the query’s vocabulary in the following way:
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