CREATE TABLE table_539 ("Team" CLOB, "Car ( s ) " CLOB, "#" FLOAT, "Driver ( s ) " CLOB, "Primary Sponsor ( s ) " CLOB, "Owner ( s ) " CLOB, "Crew Chief" CLOB, "Rounds" FLOAT)

Who drove for team Circle Sport?
SELECT "Driver(s)" FROM table_539 WHERE "Team" = 'Circle Sport'
SELECT "Driver(s)" FROM "table_539" WHERE "Team" = 'Circle Sport'