@inproceedings{de-marneffe-etal-2009-simple,
    title = "Not a Simple Yes or No: Uncertainty in Indirect Answers",
    author = "de Marneffe, Marie-Catherine  and
      Grimm, Scott  and
      Potts, Christopher",
    editor = "Healey, Patrick  and
      Pieraccini, Roberto  and
      Byron, Donna  and
      Young, Steve  and
      Purver, Matthew",
    booktitle = "Proceedings of the {SIGDIAL} 2009 Conference",
    month = sep,
    year = "2009",
    address = "London, UK",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/W09-3920/",
    pages = "136--143"
}