Diversifying Information Needs in Results of Question Retrieval Yaoyun Zhang author Xiaolong Wang author Xuan Wang author Ruifeng Xu author Jun Xu author ShiXi Fan author 2011-11 text Proceedings of 5th International Joint Conference on Natural Language Processing Haifeng Wang editor David Yarowsky editor Asian Federation of Natural Language Processing Chiang Mai, Thailand conference publication zhang-etal-2011-diversifying https://aclanthology.org/I11-1168/ 2011-11 1432 1436