Complex sentence: Debri is an ethnic minority of South Kurdufan in Sudan, who speak the Dilling Language, which is a language belonging to the Nubian branch of the Nilo-Saharan languages.
Split into simpler sentences: Debri is an ethnic minority of South Kurdufan in Sudan. It speaks Dilling, which is a language belonging to the Nubian branch of the Nilo-Saharan languages.