@inproceedings{openrelationextractionandgrounding,
  title = {Open Relation Extraction and Grounding},
  author = {Dian Yu and Lifu Huang and Heng Ji},
  year = {2017},
  booktitle = {IJCNLP 2017 11},
  url = {https://aclanthology.org/I17-1086},
}