@inproceedings{cerezo-costas-celix-salgado-2015-gradiant,
    title = "Gradiant-Analytics: Training Polarity Shifters with {CRF}s for Message Level Polarity Detection",
    author = "Cerezo-Costas, H{\'e}ctor  and
      Celix-Salgado, Diego",
    editor = "Nakov, Preslav  and
      Zesch, Torsten  and
      Cer, Daniel  and
      Jurgens, David",
    booktitle = "Proceedings of the 9th International Workshop on Semantic Evaluation ({S}em{E}val 2015)",
    month = jun,
    year = "2015",
    address = "Denver, Colorado",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/landing_page/S15-2090/",
    doi = "10.18653/v1/S15-2090",
    pages = "539--544"
}