@inproceedings{wang-etal-2020-pyramid,
    title = "{P}yramid: A Layered Model for Nested Named Entity Recognition",
    author = "Wang, Jue  and
      Shou, Lidan  and
      Chen, Ke  and
      Chen, Gang",
    editor = "Jurafsky, Dan  and
      Chai, Joyce  and
      Schluter, Natalie  and
      Tetreault, Joel",
    booktitle = "Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics",
    month = jul,
    year = "2020",
    address = "Online",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/2020.acl-main.525/",
    doi = "10.18653/v1/2020.acl-main.525",
    pages = "5918--5928"
}