question: What three cities were imperative for the scholarly and economic exchanges ?
answer: the three most important centres of Greek learning were situated in Chios , Smyrna and Aivali , all three major centres of Greek commerce
turker_answer: The three most important centres of Greek learning and commerce were situated in Chios , Smyrna and Aivali .
rule-based: Imperative for the scholarly and economic exchanges were the three most important centres of Greek learning were situated in Chios , Smyrna and Aivali , all three major centres of Greek commerce .