@article{copenprobingconceptualknowledgeinpre,
  title = {COPEN: Probing Conceptual Knowledge in Pre-trained Language Models},
  author = {Hao Peng and Xiaozhi Wang and Shengding Hu and Hailong Jin and Lei Hou and Juanzi Li and Zhiyuan Liu and Qun Liu},
  year = {2022},
  eprint = {2211.04079},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2211.04079v1},
}