@inproceedings{zhong-etal-2022-proqa,
    title = "{P}ro{QA}: Structural Prompt-based Pre-training for Unified Question Answering",
    author = "Zhong, Wanjun  and
      Gao, Yifan  and
      Ding, Ning  and
      Qin, Yujia  and
      Liu, Zhiyuan  and
      Zhou, Ming  and
      Wang, Jiahai  and
      Yin, Jian  and
      Duan, Nan",
    editor = "Carpuat, Marine  and
      de Marneffe, Marie-Catherine  and
      Meza Ruiz, Ivan Vladimir",
    booktitle = "Proceedings of the 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies",
    month = jul,
    year = "2022",
    address = "Seattle, United States",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2022.naacl-main.313/",
    doi = "10.18653/v1/2022.naacl-main.313",
    pages = "4230--4243"
}