citation: @article{dataset_pl_opi_lil_2012,
      author = {Pawel Sobkowicz and Antoni Sobkowicz},
      title ={Two-Year Study of Emotion and Communication Patterns in a Highly Polarized Political Discussion Forum},
      journal = {Social Science Computer Review},
      volume = {30},
      number = {4},
      pages = {448-469},
      year = {2012},
      doi = {10.1177/0894439312436512}
  }
  