Complex sentence: The Acholi speak a Nilotic language and are known as Luo ("Lwo") people, who are said to have come to northern Uganda from the area now known as Bahr el Ghazal in South Sudan.
Split into simpler sentences: The Acholi speak a Nilotic language and are known as Luo ("Lwo") people. They migrated south to northern Uganda from the area now known as Bahr el Ghazal in South Sudan.