@inproceedings{li-etal-2022-mmcoqa, title = "{MMC}o{QA}: Conversational Question Answering over Text, Tables, and Images", author = "Li, Yongqi and Li, Wenjie and Nie, Liqiang", editor = "Muresan, Smaranda and Nakov, Preslav and Villavicencio, Aline", booktitle = "Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)", month = may, year = "2022", address = "Dublin, Ireland", publisher = "Association for Computational Linguistics", url = "https://preview.aclanthology.org/fix-sig-urls/2022.acl-long.290/", doi = "10.18653/v1/2022.acl-long.290", pages = "4220--4231" }