@InProceedings{chen-EtAl:2018:EMNLP8,
  author    = {Chen, Yubo  and  Yang, Hang  and  Liu, Kang  and  Zhao, Jun  and  Jia, Yantao},
  title     = {Collective Event Detection via a Hierarchical and Bias Tagging Networks with Gated Multi-level Attention Mechanisms},
  booktitle = {Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing},
  month     = {October-November},
  year      = {2018},
  address   = {Brussels, Belgium},
  publisher = {Association for Computational Linguistics},
  pages     = {1267--1276},
  url       = {http://www.aclweb.org/anthology/D18-1158}
}