@inproceedings{canuto2016,
  title={Exploiting New Sentiment-Based Meta-level Features for Effective Sentiment Analysis},
  author={S{\'e}rgio Canuto and Marcos Andr{\'e} Gon\c{c}alves and Fabr{\'i}cio Benevenuto},
  booktitle={Proceedings of the Nineth ACM International Conference on Web Search and Data Mining},
  year={2016},
  organization={ACM}
}