citation: @article{dataset_es_muchocine,
      title={Experiments in sentiment classification of movie reviews in Spanish},
      author={Cruz, Fermin L and Troyano, Jose A and Enriquez, Fernando and Ortega, Javier},
      journal={Procesamiento del Lenguaje Natural},
      volume={41},
      pages={73--80},
      year={2008},
      publisher={SOC ESPANOLA PROCESAMIENTO LENGUAJE NATURAL-SEPLN DEPT LENGUAJES \& SISTEMAS~…}
  }
  