@inproceedings{toprak-etal-2010-sentence,
    title = "Sentence and Expression Level Annotation of Opinions in User-Generated Discourse",
    author = "Toprak, Cigdem  and
      Jakob, Niklas  and
      Gurevych, Iryna",
    editor = "Haji{\v{c}}, Jan  and
      Carberry, Sandra  and
      Clark, Stephen  and
      Nivre, Joakim",
    booktitle = "Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics",
    month = jul,
    year = "2010",
    address = "Uppsala, Sweden",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-emnlp/P10-1059/",
    pages = "575--584"
}