NADI 2021: The Second Nuanced Arabic Dialect Identification Shared Task Muhammad Abdul-Mageed author Chiyu Zhang author AbdelRahim Elmadany author Houda Bouamor author Nizar Habash author 2021-04 text Proceedings of the Sixth Arabic Natural Language Processing Workshop Nizar Habash editor Houda Bouamor editor Hazem Hajj editor Walid Magdy editor Wajdi Zaghouani editor Fethi Bougares editor Nadi Tomeh editor Ibrahim Abu Farha editor Samia Touileb editor Association for Computational Linguistics Kyiv, Ukraine (Virtual) conference publication abdul-mageed-etal-2021-nadi https://aclanthology.org/2021.wanlp-1.28/ 2021-04 244 259