@inproceedings{pinchak-etal-2009-flexible,
    title = "Flexible Answer Typing with Discriminative Preference Ranking",
    author = "Pinchak, Christopher  and
      Lin, Dekang  and
      Rafiei, Davood",
    editor = "Lascarides, Alex  and
      Gardent, Claire  and
      Nivre, Joakim",
    booktitle = "Proceedings of the 12th Conference of the {E}uropean Chapter of the {ACL} ({EACL} 2009)",
    month = mar,
    year = "2009",
    address = "Athens, Greece",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-emnlp/E09-1076/",
    pages = "666--674"
}