@inproceedings{mitchell-etal-2013-open,
    title = "Open Domain Targeted Sentiment",
    author = "Mitchell, Margaret  and
      Aguilar, Jacqui  and
      Wilson, Theresa  and
      Van Durme, Benjamin",
    editor = "Yarowsky, David  and
      Baldwin, Timothy  and
      Korhonen, Anna  and
      Livescu, Karen  and
      Bethard, Steven",
    booktitle = "Proceedings of the 2013 Conference on Empirical Methods in Natural Language Processing",
    month = oct,
    year = "2013",
    address = "Seattle, Washington, USA",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/D13-1171/",
    pages = "1643--1654"
}