NEXT: An Event Schema Extension Approach for Closed-Domain Event Extraction Models Elena Tuparova author Petar Ivanov author Andrey Tagarev author Svetla Boytcheva author Ivan Koychev author 2023-09 text Proceedings of the 6th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text Ali Hürriyetoğlu editor Hristo Tanev editor Vanni Zavarella editor Reyyan Yeniterzi editor Erdem Yörük editor Milena Slavcheva editor INCOMA Ltd., Shoumen, Bulgaria Varna, Bulgaria conference publication tuparova-etal-2023-next https://aclanthology.org/2023.case-1.16/ 2023-09 113 123