Collective Event Detection via a Hierarchical and Bias Tagging Networks with Gated Multi-level Attention Mechanisms Yubo Chen author Hang Yang author Kang Liu author Jun Zhao author Yantao Jia author 2018-oct-nov text Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing Ellen Riloff editor David Chiang editor Julia Hockenmaier editor Jun’ichi Tsujii editor Association for Computational Linguistics Brussels, Belgium conference publication chen-etal-2018-collective 10.18653/v1/D18-1158 https://aclanthology.org/D18-1158/ 2018-oct-nov 1267 1276