Complex sentence: The resulting caverns were later used to form water reservoirs into which water was diverted from the main aqueducts, and the Ancient Greece dug long and elaborate aqueducts beneath the city more than 2,500 years ago.
Split into simpler sentences: The resulting caverns were used to form water reservoirs into which water was diverted from the main aqueducts. The Greeks dug long and elaborate aqueducts beneath the city more than 2,500 years ago.