@InProceedings{headdeniii-johnson-mcclosky:2009:NAACLHLT09,
  author    = {Headden III, William P.  and  Johnson, Mark  and  McClosky, David},
  title     = {Improving Unsupervised Dependency Parsing with Richer Contexts and Smoothing},
  booktitle = {Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics},
  month     = {June},
  year      = {2009},
  address   = {Boulder, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {101--109},
  url       = {http://www.aclweb.org/anthology/N/N09/N09-1012}
}