@article{whatiseventknowledgegraphasurvey,
  title = {What is Event Knowledge Graph: A Survey},
  author = {Saiping Guan and Xueqi Cheng and Long Bai and Fujun Zhang and Zixuan Li and Yutao Zeng and Xiaolong Jin and Jiafeng Guo},
  year = {2021},
  eprint = {2112.15280},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2112.15280v2},
}