@InProceedings{YoheiTakaku:2012,
  author = {Yohei Takaku, Nobuhiro Kaji, Naoki Yoshinaga, and Masashi Toyoda},
  title = {Identifying Constant and Unique Relations by using Time-Series Text},
  booktitle = {Proceedings of the 2012 Conference on Empirical Methods in Natural Language Processing (EMNLP 2012)},
  year      = {2012},
  address   = {Jeju, Korea},
  pages     = {883-892},
}