@inproceedings{opinionretrievalsystemsusingtweet,
  title = {Opinion Retrieval Systems using Tweet-external Factors},
  author = {Yoon-Sung Kim and Young-In Song and Hae-Chang Rim},
  year = {2016},
  booktitle = {COLING 2016 12},
  url = {https://aclanthology.org/C16-2027},
}