Complex sentence: From the 17th Century BCE the Mitanni formed a ruling class over the Hurrians, an ancient indigenous Caucasian people who spoke a Language Isolate, similarly, the Hittites absorbed the Hattians, a people speaking a language of the North Caucasian group.
Split into simpler sentences: From the 17th Century BCE the Mitanni formed a ruling class over the Hurrians, an ancient indigenous Caucasian people who spoke a language isolate. Similarly, the Hittites absorbed the Hattians, a people speaking a language of the North Caucasian group.