Complex sentence: The earliest signs of prehistoric settlement in Euonymeia were recognized in the 1950s and' 60s at the "Kontopigado" site, where Neolithic era masonry was identified during expansion work on the Vouliagmenis Avenue around a small hill, rising above the surrounding ground.
Split into simpler sentences: The earliest signs of prehistoric settlement in Euonymeia were recognized in the 1950s and' 60s at the "Kontopigado" site. During expansion work on the Vouliagmenis Avenue, neolithic era masonry was identified around a small hill rising above the surrounding ground.