@article{recognizingnestedentitiesfromflat,
  title = {Recognizing Nested Entities from Flat Supervision: A New NER Subtask, Feasibility and Challenges},
  author = {Enwei Zhu and Yiyang Liu and Ming Jin and Jinpeng Li},
  year = {2022},
  eprint = {2211.00301},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2211.00301v1},
}