@inproceedings{zou-etal-2015-unsupervised,
    title = "Unsupervised Negation Focus Identification with Word-Topic Graph Model",
    author = "Zou, Bowei  and
      Zhou, Guodong  and
      Zhu, Qiaoming",
    editor = "M{\`a}rquez, Llu{\'i}s  and
      Callison-Burch, Chris  and
      Su, Jian",
    booktitle = "Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing",
    month = sep,
    year = "2015",
    address = "Lisbon, Portugal",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/D15-1187/",
    doi = "10.18653/v1/D15-1187",
    pages = "1632--1636"
}