@InProceedings{han-EtAl:2018:EMNLP1,
  author    = {Han, Xu  and  Yu, Pengfei  and  Liu, Zhiyuan  and  Sun, Maosong  and  Li, Peng},
  title     = {Hierarchical Relation Extraction with Coarse-to-Fine Grained Attention},
  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     = {2236--2245},
  url       = {http://www.aclweb.org/anthology/D18-1247}
}