Finding Optimists and Pessimists on Twitter Xianzhi Ruan author Steven Wilson author Rada Mihalcea author 2016-08 text Proceedings of the 54th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers) Katrin Erk editor Noah A Smith editor Association for Computational Linguistics Berlin, Germany conference publication ruan-etal-2016-finding 10.18653/v1/P16-2052 https://aclanthology.org/P16-2052/ 2016-08 320 325