... Association for Computational Linguistics, pages 1367–1375,Uppsala, Sweden, 11-16 July 2010.c2010 Association for Computational LinguisticsA Unified Graph Model for Sentence-based Opinion Retrieval ... research on unified opinion retrieval models. Eguchi and Lavrenko proposed an opinion re-trieval model in the framework of generative language modeling (Eguchi and Lavrenko, 2006). They modeled ... and Ounis, 2006). Therefore, in this paper we regard the information needs for opinion retrieval as relevant opinion. 2.2 Motivation of Our Approach In traditional information retrieval (IR)...