@InProceedings{noro-EtAl:2006:COLACL,
  author    = {Noro, Taichi  and  Inui, Takashi  and  Takamura, Hiroya  and  Okumura, Manabu},
  title     = {Time Period Identification of Events in Text},
  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     = {1153--1160},
  url       = {http://www.aclweb.org/anthology/P06-1145},
  doi       = {10.3115/1220175.1220320}
}