K2Q: Generating Natural Language Questions from Keywords with User Refinements Zhicheng Zheng author Xiance Si author Edward Chang author Xiaoyan Zhu 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 zheng-etal-2011-k2q https://aclanthology.org/I11-1106/ 2011-11 947 955