CREATE TABLE table_53140 ("Entrant" CLOB, "Constructor" CLOB, "Chassis" CLOB, "Engine" CLOB, "Driver" CLOB, "Rounds" CLOB)

with 6 rounds, and a 52 51/52 chassis, who is the driver?
SELECT "Driver" FROM table_53140 WHERE "Rounds" = '6' AND "Chassis" = '52 51/52'
SELECT "Driver" FROM "table_53140" WHERE "Chassis" = '52 51/52' AND "Rounds" = '6'