@inproceedings{hui-etal-2011-question,
    title = "Question classification based on an extended class sequential rule model",
    author = "Hui, Zijing  and
      Liu, Juan  and
      Ouyang, Lumei",
    editor = "Wang, Haifeng  and
      Yarowsky, David",
    booktitle = "Proceedings of 5th International Joint Conference on Natural Language Processing",
    month = nov,
    year = "2011",
    address = "Chiang Mai, Thailand",
    publisher = "Asian Federation of Natural Language Processing",
    url = "https://preview.aclanthology.org/landing_page/I11-1105/",
    pages = "938--946"
}