Identifying and Tracking Sentiments and Topics from Social Media Texts during Natural Disasters Min Yang author Jincheng Mei author Heng Ji author Wei Zhao author Zhou Zhao author Xiaojun Chen author 2017-09 text Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing Martha Palmer editor Rebecca Hwa editor Sebastian Riedel editor Association for Computational Linguistics Copenhagen, Denmark conference publication yang-etal-2017-identifying 10.18653/v1/D17-1055 https://aclanthology.org/D17-1055/ 2017-09 527 533