@inproceedings{happyaccidentasentimentcomposition,
  title = {Happy Accident: A Sentiment Composition Lexicon for Opposing Polarity Phrases},
  author = {Svetlana Kiritchenko and Saif Mohammad},
  year = {2016},
  booktitle = {LREC 2016 5},
  url = {https://aclanthology.org/L16-1184},
}