Simplify the following text for a Grade 9 native English-speaking person.
Original: The earliest evidence for this culture is found on the Ararat plain ; thence it spread to Georgia by 3000 BC , and during the next millennium it proceeded westward to the Erzurum plain , southwest to Cilicia , and to the southeast into an area below the Urmia basin and Lake Van , down to the borders of present day Syria .
Simplified: The earliest evidence for this culture is found on the Ararat plain ; thence it spread to Georgia by 3000 B.C.