CASE 2021 Task 2: Zero-Shot Classification of Fine-Grained Sociopolitical Events with Transformer Models Benjamin J Radford author 2021-08 text Proceedings of the 4th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE 2021) Ali Hürriyetoğlu editor Association for Computational Linguistics Online conference publication radford-2021-case 10.18653/v1/2021.case-1.25 https://aclanthology.org/2021.case-1.25/ 2021-08 203 207