%0 Conference Proceedings %T SU-NLP at CASE 2021 Task 1: Protest News Detection for English %A Çelik, Furkan %A Dalkılıç, Tuğberk %A Beyhan, Fatih %A Yeniterzi, Reyyan %Y Hürriyetoğlu, Ali %S Proceedings of the 4th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE 2021) %D 2021 %8 August %I Association for Computational Linguistics %C Online %F celik-etal-2021-su %X This paper summarizes our group’s efforts in the multilingual protest news detection shared task, which is organized as a part of the Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE) Workshop. We participated in all four subtasks in English. Especially in the identification of event containing sentences task, our proposed ensemble approach using RoBERTa and multichannel CNN-LexStem model yields higher performance. Similarly in the event extraction task, our transformer-LSTM-CRF architecture outperforms regular transformers significantly. %R 10.18653/v1/2021.case-1.17 %U https://aclanthology.org/2021.case-1.17 %U https://doi.org/10.18653/v1/2021.case-1.17 %P 131-137