Complex sentence: Tas-Silġ is a multi-period sanctuary site covering all eras from Neolithic to the fourth century AD, and due to this it indicates to archaeologists several different layers of excavation.
Split into simpler sentences: Tas-Silġ is a multi-period sanctuary site covering all eras from Neolithic to the fourth century AD. Due to its various settlements along different periods, Tas-Silġ indicates to archaeologists several different layers of excavation.