@inproceedings{wang-etal-2021-structured,
    title = "Structured Refinement for Sequential Labeling",
    author = "Wang, Yiran  and
      Shindo, Hiroyuki  and
      Matsumoto, Yuji  and
      Watanabe, Taro",
    editor = "Zong, Chengqing  and
      Xia, Fei  and
      Li, Wenjie  and
      Navigli, Roberto",
    booktitle = "Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021",
    month = aug,
    year = "2021",
    address = "Online",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/2021.findings-acl.164/",
    doi = "10.18653/v1/2021.findings-acl.164",
    pages = "1873--1884"
}