@inproceedings{anempiricalstudyonfinegrainednamed,
  title = {An Empirical Study on Fine-Grained Named Entity Recognition},
  author = {Khai Mai and Thai-Hoang Pham and Minh Trung Nguyen and Tuan Duc Nguyen and Danushka Bollegala and Ryohei Sasano and Satoshi Sekine},
  year = {2018},
  booktitle = {COLING 2018 8},
  url = {https://aclanthology.org/C18-1060},
}