@InProceedings{davidov-rappoport:2006:COLACL,
  author    = {Davidov, Dmitry  and  Rappoport, Ari},
  title     = {Efficient Unsupervised Discovery of Word Categories Using Symmetric Patterns and High Frequency Words},
  booktitle = {Proceedings of the 21st International Conference on Computational Linguistics and 44th Annual Meeting of the Association for Computational Linguistics},
  month     = {July},
  year      = {2006},
  address   = {Sydney, Australia},
  publisher = {Association for Computational Linguistics},
  pages     = {297--304},
  url       = {http://www.aclweb.org/anthology/P06-1038},
  doi       = {10.3115/1220175.1220213}
}