@article{spanbasedjointentityandrelation,
  title = {Span-based Joint Entity and Relation Extraction with Transformer Pre-training},
  author = {Markus Eberts and Adrian Ulges},
  year = {2019},
  eprint = {1909.07755},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1909.07755v4},
}