@inproceedings{chalkidis-etal-2018-obligation,
    title = "Obligation and Prohibition Extraction Using Hierarchical {RNN}s",
    author = "Chalkidis, Ilias  and
      Androutsopoulos, Ion  and
      Michos, Achilleas",
    editor = "Gurevych, Iryna  and
      Miyao, Yusuke",
    booktitle = "Proceedings of the 56th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)",
    month = jul,
    year = "2018",
    address = "Melbourne, Australia",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/P18-2041/",
    doi = "10.18653/v1/P18-2041",
    pages = "254--259"
}