Proceedings of the 4th Workshop on Open-Source Arabic Corpora and Processing Tools, with a Shared Task on Offensive Language Detection Hend Al-Khalifa editor Walid Magdy editor Kareem Darwish editor Tamer Elsayed editor Hamdy Mubarak editor 2020-05 European Language Resources Association Marseille, France text conference publication 979-10-95546-51-1 osact-2020-open https://aclanthology.org/2020.osact-1.0/