@inproceedings{openrelationextractionrelationalknowledg,
  title = {Open Relation Extraction: Relational Knowledge Transfer from Supervised Data to Unsupervised Data},
  author = {Ruidong Wu and Yuan YAO and Xu Han and Ruobing Xie and Zhiyuan Liu and Fen Lin and Leyu Lin and Maosong Sun},
  year = {2019},
  booktitle = {IJCNLP 2019 11},
  url = {https://aclanthology.org/D19-1021},
}