Elhuyar-IXA: Semantic Relatedness and Cross-Lingual Passage Retrieval [chapter]

Eneko Agirre, Olatz Ansa, Xabier Arregi, Maddalen Lopez de Lacalle, Arantxa Otegi, Xabier Saralegi, Hugo Zaragoza
2010 Lecture Notes in Computer Science  
This article describes the participation of the joint ElhuyarIXA group in the RespubliQA exercise at QA&CLEF. We put together tools developed separately and we combined and shared knowledge and technology between the two groups. In particular, we participated in the English-English monolingual task and in the Basque-English crosslingual one. Our focus has been threefold: (1) to check to what extent IR can achieve good results in passage retrieval without question analysis and answer validation,
more » ... (2) to check Machine Readable Dictionary techniques for the Basque to English retrieval when faced with the lack of parallel corpora for Basque in this domain, and (3) to check the contribution of semantic relatedness based on WordNet to expand the passages to related words. Our results show that IR provides good results in the monolingual task, that our crosslingual system lowers the performance compared to the monolingual runs, and that semantic relatedness improves the results in both tasks (by 6 and 2 points, respectively).
doi:10.1007/978-3-642-15754-7_31 fatcat:k2wh3gvvnndkbix3calvezvu7y