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author_ss:"Voorhees, E.M."
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theme_ss:"Sprachretrieval"
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theme_ss:"Retrievalstudien"
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year_i:[2000 TO 2010}
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Voorhees, E.M.: Question answering in TREC (2005)
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1.0 = *:*, product of: 1.0 = boost 1.0 = queryNorm