Complex sentence: In antiquity, the Yarim area was the core of the Himyarite Kingdom, which ruled over much of Southern Arabia from about 115 BC to about AD 575; the Himyarite capital of Thifar was about 9 miles south of Yarim.
Split into simpler sentences: In antiquity, the Yarim area was the core of the Himyarite Kingdom, which ruled over much of Southern Arabia from about 115 BC to about AD 575. The Himyarite capital of Thifar was located about 9 miles south of Yarim.