@InProceedings{yoshikawa-asahara-iida:2012:POSTERS,
  author    = {Yoshikawa, Katsumasa  and  Asahara, Masayuki  and  Iida, Ryu},
  title     = {Identifying Temporal Relations by Sentence and Document Optimizations},
  booktitle = {Proceedings of COLING 2012: Posters},
  month     = {December},
  year      = {2012},
  address   = {Mumbai, India},
  publisher = {The COLING 2012 Organizing Committee},
  pages     = {1371--1380},
  url       = {http://www.aclweb.org/anthology/C12-2134}
}