@inproceedings{ji-etal-2022-answer,
    title = "To Answer or Not To Answer? Improving Machine Reading Comprehension Model with Span-based Contrastive Learning",
    author = "Ji, Yunjie  and
      Chen, Liangyu  and
      Dou, Chenxiao  and
      Ma, Baochang  and
      Li, Xiangang",
    editor = "Carpuat, Marine  and
      de Marneffe, Marie-Catherine  and
      Meza Ruiz, Ivan Vladimir",
    booktitle = "Findings of the Association for Computational Linguistics: NAACL 2022",
    month = jul,
    year = "2022",
    address = "Seattle, United States",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest_wac_2008/2022.findings-naacl.96/",
    doi = "10.18653/v1/2022.findings-naacl.96",
    pages = "1292--1300"
}