Answer Validation by Information Distance Calculation Fangtao Li author Xian Zhang author Xiaoyan Zhu 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 li-etal-2008-answer https://aclanthology.org/W08-1806/ 2008-08 42 49