PROTEST-ER: Retraining BERT for Protest Event Extraction Tommaso Caselli author Osman Mutlu author Angelo Basile author Ali Hürriyetoğlu 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 caselli-etal-2021-protest 10.18653/v1/2021.case-1.4 https://aclanthology.org/2021.case-1.4/ 2021-08 12 19