@inproceedings{multigrainednamedentityrecognition,
  title = {Multi-Grained Named Entity Recognition},
  author = {Congying Xia and Chenwei Zhang and Tao Yang and Yaliang Li and Nan Du and Xian Wu and Wei Fan and Fenglong Ma and Philip Yu},
  year = {2019},
  booktitle = {ACL 2019 7},
  eprint = {1906.08449},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1906.08449v1},
}