@InProceedings{demarneffe-grimm-potts:2009:SIGDIAL,
  author    = {de Marneffe, Marie-Catherine  and  Grimm, Scott  and  Potts, Christopher},
  title     = {Not a Simple Yes or No: Uncertainty in Indirect Answers},
  booktitle = {Proceedings of the SIGDIAL 2009 Conference},
  month     = {September},
  year      = {2009},
  address   = {London, UK},
  publisher = {Association for Computational Linguistics},
  pages     = {136--143},
  url       = {http://www.aclweb.org/anthology/W09-3920}
}