@inproceedings{voorhees-2008-contradictions,
    title = "Contradictions and Justifications: Extensions to the Textual Entailment Task",
    author = "Voorhees, Ellen M.",
    editor = "Moore, Johanna D.  and
      Teufel, Simone  and
      Allan, James  and
      Furui, Sadaoki",
    booktitle = "Proceedings of ACL-08: HLT",
    month = jun,
    year = "2008",
    address = "Columbus, Ohio",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/P08-1008/",
    pages = "63--71"
}