@inproceedings{sajjad-etal-2012-underspecified,
    title = "Underspecified Query Refinement via Natural Language Question Generation",
    author = "Sajjad, Hassan  and
      Pantel, Patrick  and
      Gamon, Michael",
    editor = "Kay, Martin  and
      Boitet, Christian",
    booktitle = "Proceedings of {COLING} 2012",
    month = dec,
    year = "2012",
    address = "Mumbai, India",
    publisher = "The COLING 2012 Organizing Committee",
    url = "https://preview.aclanthology.org/fix-sig-urls/C12-1143/",
    pages = "2341--2356"
}