@inproceedings{min-etal-2021-joint,
    title = "Joint Passage Ranking for Diverse Multi-Answer Retrieval",
    author = "Min, Sewon  and
      Lee, Kenton  and
      Chang, Ming-Wei  and
      Toutanova, Kristina  and
      Hajishirzi, Hannaneh",
    editor = "Moens, Marie-Francine  and
      Huang, Xuanjing  and
      Specia, Lucia  and
      Yih, Scott Wen-tau",
    booktitle = "Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing",
    month = nov,
    year = "2021",
    address = "Online and Punta Cana, Dominican Republic",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/2021.emnlp-main.560/",
    doi = "10.18653/v1/2021.emnlp-main.560",
    pages = "6997--7008"
}