Informativity in Image Captions vs. Referring Expressions Elizabeth Coppock author Danielle Dionne author Nathanial Graham author Elias Ganem author Shijie Zhao author Shawn Lin author Wenxing Liu author Derry Wijaya author 2020-06 text Proceedings of the Probability and Meaning Conference (PaM 2020) Christine Howes editor Stergios Chatzikyriakidis editor Adam Ek editor Vidya Somashekarappa editor Association for Computational Linguistics Gothenburg conference publication coppock-etal-2020-informativity https://aclanthology.org/2020.pam-1.14/ 2020-06 104 108