Improving the Naturalness and Diversity of Referring Expression Generation models using Minimum Risk Training Nikolaos Panagiaris author Emma Hart author Dimitra Gkatzia author 2020-12 text Proceedings of the 13th International Conference on Natural Language Generation Brian Davis editor Yvette Graham editor John Kelleher editor Yaji Sripada editor Association for Computational Linguistics Dublin, Ireland conference publication panagiaris-etal-2020-improving 10.18653/v1/2020.inlg-1.7 https://aclanthology.org/2020.inlg-1.7/ 2020-12 41 51