@inproceedings{yao-etal-2013-answer,
    title = "Answer Extraction as Sequence Tagging with Tree Edit Distance",
    author = "Yao, Xuchen  and
      Van Durme, Benjamin  and
      Callison-Burch, Chris  and
      Clark, Peter",
    editor = "Vanderwende, Lucy  and
      Daum{\'e} III, Hal  and
      Kirchhoff, Katrin",
    booktitle = "Proceedings of the 2013 Conference of the North {A}merican Chapter of the Association for Computational Linguistics: Human Language Technologies",
    month = jun,
    year = "2013",
    address = "Atlanta, Georgia",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/N13-1106/",
    pages = "858--867"
}