Complex sentence: According to Human Rights Watch, the Ogaden is the largest Darod clan in Ethiopia's Somali Region, and may account for 80 to 85 percent of the Somali population in Ethiopia.
Split into simpler sentences: According to Human Rights Watch, the Ogaden is the largest Darod clan. Also the largest Somali Clan in Ethiopia's Somali Region, and may account for 80 to 85 percent of the Somali population in Ethiopia.