CREATE TABLE table_30832 ("Round" FLOAT, "Date" TEXT, "Grand Prix" TEXT, "Circuit" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Race Winner" TEXT)

Who won the race on August 15?
SELECT "Race Winner" FROM table_30832 WHERE "Date" = 'August 15'
SELECT "Race Winner" FROM "table_30832" WHERE "Date" = 'August 15'