@InProceedings{yao-EtAl:2013:NAACL-HLT,
  author    = {Yao, Xuchen  and  Van Durme, Benjamin  and  Callison-Burch, Chris  and  Clark, Peter},
  title     = {Answer Extraction as Sequence Tagging with Tree Edit Distance},
  booktitle = {Proceedings of the 2013 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies},
  month     = {June},
  year      = {2013},
  address   = {Atlanta, Georgia},
  publisher = {Association for Computational Linguistics},
  pages     = {858--867},
  url       = {http://www.aclweb.org/anthology/N13-1106}
}