Finnish, Portuguese and Russian Retrieval with Hummingbird SearchServer™ at CLEF 2004

Hummingbird participated in the Finnish, Portuguese, Russian and French monolingual information retrieval tasks of the Cross-Language Evaluation Forum (CLEF) 2004: for the natural language queries, find all the relevant documents (with high precision) in the CLEF 2004 document sets. SearchServer’s experimental lexical stemmers significantly increased mean average precision for each of the 4 languages. For Finnish, mean average precision was significantly higher with SearchServer’s experimental decompounding option enabled. For each language, the submitted SearchServer run returned a relevant document in the first row for more than half of the short (Titleonly) queries. At least one relevant document was returned in the first ten rows for 75-90% of the short queries.