@InProceedings{persing-ng:2009:ACLIJCNLP,
  author    = {Persing, Isaac  and  Ng, Vincent},
  title     = {Semi-Supervised Cause Identification from Aviation Safety Reports},
  booktitle = {Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP},
  month     = {August},
  year      = {2009},
  address   = {Suntec, Singapore},
  publisher = {Association for Computational Linguistics},
  pages     = {843--851},
  url       = {http://www.aclweb.org/anthology/P/P09/P09-1095}
}