Using Lexico-Semantic Information for Query Expansion in Passage Retrieval for Question Answering Lonneke van der Plas author Jörg Tiedemann author 2008-08 text Coling 2008: Proceedings of the 2nd workshop on Information Retrieval for Question Answering Mark A Greenwood editor Coling 2008 Organizing Committee Manchester, UK conference publication van-der-plas-tiedemann-2008-using https://aclanthology.org/W08-1807/ 2008-08 50 57