@InProceedings{ahn:2006:ARTE,
  author    = {Ahn, David},
  title     = {The stages of event extraction},
  booktitle = {Proceedings of the Workshop on Annotating and Reasoning about Time and Events},
  month     = {July},
  year      = {2006},
  address   = {Sydney, Australia},
  publisher = {Association for Computational Linguistics},
  pages     = {1--8},
  url       = {http://www.aclweb.org/anthology/W/W06/W06-0901}
}