@misc{wang2015sentiment,
  title={Sentiment Expression via Emoticons on Social Media},
  author={Hao Wang and Jorge A. Castanon},
  year={2015},
  eprint={1511.02556},
  archivePrefix={arXiv},
  primaryClass={cs.CL},
  url={https://arxiv.org/abs/1511.02556}
}