CREATE TABLE table_25543 ("Event" FLOAT, "Circuit" TEXT, "Date" TEXT, "Pole Position" TEXT, "Race 1 Winner" TEXT, "Race 2 Winner" TEXT, "Race 3 Winner" TEXT)

Who was the race 1 winner at the race held at Winton Motor Raceway?
SELECT "Race 1 Winner" FROM table_25543 WHERE "Circuit" = 'Winton Motor Raceway'
SELECT "Race 1 Winner" FROM "table_25543" WHERE "Circuit" = 'Winton Motor Raceway'