Contrastive Learning with Expectation-Maximization for Weakly Supervised Phrase Grounding Keqin Chen author Richong Zhang author Samuel Mensah author Yongyi Mao author 2022-12 text Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing Yoav Goldberg editor Zornitsa Kozareva editor Yue Zhang editor Association for Computational Linguistics Abu Dhabi, United Arab Emirates conference publication chen-etal-2022-contrastive 10.18653/v1/2022.emnlp-main.586 https://aclanthology.org/2022.emnlp-main.586/ 2022-12 8549 8559