@InProceedings{takaku-EtAl:2012:EMNLP-CoNLL,
  author    = {Takaku, Yohei  and  Kaji, Nobuhiro  and  Yoshinaga, Naoki  and  Toyoda, Masashi},
  title     = {Identifying Constant and Unique Relations by using Time-Series Text},
  booktitle = {Proceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning},
  month     = {July},
  year      = {2012},
  address   = {Jeju Island, Korea},
  publisher = {Association for Computational Linguistics},
  pages     = {883--892},
  url       = {http://www.aclweb.org/anthology/D12-1081}
}