@inproceedings{gradiantanalyticstrainingpolarityshifter,
  title = {Gradiant-Analytics: Training Polarity Shifters with CRFs for Message Level Polarity Detection},
  author = {H{\'e}ctor Cerezo-Costas and Diego Celix-Salgado},
  year = {2015},
  booktitle = {SEMEVAL 2015 6},
  url = {https://aclanthology.org/S15-2090},
}