@article{complexrelationextractionchallengesand,
  title = {Complex Relation Extraction: Challenges and Opportunities},
  author = {Haiyun Jiang and Qiaoben Bao and Qiao Cheng and Deqing Yang and Li Wang and Yanghua Xiao},
  year = {2020},
  eprint = {2012.04821},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2012.04821v1},
}