@inproceedings{mpqa30anentityeventlevelsentimentcorpus,
  title = {MPQA 3.0: An Entity/Event-Level Sentiment Corpus},
  author = {Janyce Wiebe and Lingjia Deng},
  year = {2015},
  booktitle = {HLT 2015 5},
  url = {https://aclanthology.info/papers/N15-1146/n15-1146},
}