@InProceedings{voorhees:2008:ACLMain,
  author    = {Voorhees, Ellen M.},
  title     = {Contradictions and Justifications: Extensions to the Textual Entailment Task},
  booktitle = {Proceedings of ACL-08: HLT},
  month     = {June},
  year      = {2008},
  address   = {Columbus, Ohio},
  publisher = {Association for Computational Linguistics},
  pages     = {63--71},
  url       = {http://www.aclweb.org/anthology/P/P08/P08-1008}
}