@InProceedings{zulaicahernandez-gutierrezrexach:2009:SIGDIAL,
  author    = {Zulaica-Hern{\'a}ndez, Iker  and  Guti{\'e}rrez-Rexach, Javier},
  title     = {Tense, Temporal Expressions and Demonstrative Licensing in Natural Discourse.},
  booktitle = {Proceedings of the SIGDIAL 2009 Conference},
  month     = {September},
  year      = {2009},
  address   = {London, UK},
  publisher = {Association for Computational Linguistics},
  pages     = {97--106},
  url       = {http://www.aclweb.org/anthology/W09-3913}
}