@inproceedings{li2008answer,
  title={Answer validation by information distance calculation},
  author={Li, Fangtao and Zhang, Xian and Zhu, Xiaoyan},
  booktitle={Coling 2008: Proceedings of the 2nd workshop on Information Retrieval for Question Answering},
  pages={42--49},
  year={2008},
  organization={Association for Computational Linguistics}
}