Complex sentence: Athens-Clarke County is a consolidated city--county in U.S. state of Georgia, U.S., in the northeastern part of the state, comprised of the city of Athens proper (the former county seat before consolidation) and Clarke County.
Split into simpler sentences: Athens-Clarke County is a consolidated city--county in Georgia, U.S., in the northeastern part of the state. The consolidation is comprised of the city of Athens proper (the former county seat before consolidation) and Clarke County.