@inproceedings{duan-etal-2008-searching,
    title = "Searching Questions by Identifying Question Topic and Question Focus",
    author = "Duan, Huizhong  and
      Cao, Yunbo  and
      Lin, Chin-Yew  and
      Yu, Yong",
    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/P08-1019/",
    pages = "156--164"
}