Complex sentence: The area surrounding Campo de Criptana has been inhabited since prehistoric times, from which era implements of hunting, gathering, and agriculture have been found in various locations, as have ceramics, particularly from the Bronze Age.
Split into simpler sentences: The area surrounding Campo de Criptana has been inhabited since prehistoric times. Prehistoric implements of hunting, gathering, and agriculture have been found in various locations, as have ceramics, particularly from the Bronze Age.