@inproceedings{ramanath-etal-2013-entailment,
    title = "{E}ntailment: An Effective Metric for Comparing and Evaluating Hierarchical and Non-hierarchical Annotation Schemes",
    author = "Ramanath, Rohan  and
      Choudhury, Monojit  and
      Bali, Kalika",
    editor = "Pareja-Lora, Antonio  and
      Liakata, Maria  and
      Dipper, Stefanie",
    booktitle = "Proceedings of the 7th Linguistic Annotation Workshop and Interoperability with Discourse",
    month = aug,
    year = "2013",
    address = "Sofia, Bulgaria",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/W13-2306/",
    pages = "42--50"
}