CREATE TABLE table_14615 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

What entrant drove a car with a Moore chassis prior to 1953?
SELECT "Entrant" FROM table_14615 WHERE "Year" < '1953' AND "Chassis" = 'moore'
SELECT "Entrant" FROM "table_14615" WHERE "Chassis" = 'moore' AND "Year" < '1953'