@inproceedings{zheng2011k2q,
  title={K2q: Generating natural language questions from keywords with user refinements},
  author={Zheng, Zhicheng and Si, Xiance and Chang, Edward and Zhu, Xiaoyan},
  booktitle={Proceedings of 5th International Joint Conference on Natural Language Processing},
  pages={947--955},
  year={2011}
}