question: Where have the centers of culture been located for the Grecian world historically ?
answer: The cultural centers of the Greeks have included Athens , Thessalonica , Alexandria , Smyrna , and Constantinople at various periods .
turker_answer: Historically , the centers of culture for the Grecian world have been located in Athens , Thessalonica , Alexandria , Smyrna , and Constantinople at various periods .
rule-based: The centers of culture have been located for the Grecian world historically in the cultural centers of the Greeks have included Athens , Thessalonica , Alexandria , Smyrna , and Constantinople at various periods .