@inproceedings{zhao-etal-2021-distantly,
    title = "Distantly-Supervised Dense Retrieval Enables Open-Domain Question Answering without Evidence Annotation",
    author = "Zhao, Chen  and
      Xiong, Chenyan  and
      Boyd-Graber, Jordan  and
      Daum{\'e} III, Hal",
    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://aclanthology.org/2021.emnlp-main.756/",
    doi = "10.18653/v1/2021.emnlp-main.756",
    pages = "9612--9622"
}