Complex sentence: Alur are an ethnic group who live mainly in the Nebbi, Zombo, and Arua districts in northwestern Uganda, but also in northeastern Democratic Republic of the Congo, north of Lake Albert.
Split into simpler sentences: Alur are an ethnic group who live in northwestern Uganda and northeastern Democratic Republic of the Congo (DRC). In Uganda, they live mainly in the Nebbi, Zombo, and Arua districts, in the DRC, they reside mostly north of Lake Albert.