Complex sentence: Pokomo are an ethnic group of Kenya, from the Bantu language group and is not one of the groups that make up the Mijikenda (which means "Nine Villages"); they are a distinct tribe with their own sub-clans/tribes.
Split into simpler sentences: Pokomo are an ethnic group of Kenya, from the Bantu language group. They are not one of the groups that make up the Mijikenda (which means "nine villages"); they are a distinct tribe with their own sub-clans/tribes.