CREATE TABLE table_78253 ("Race Title" TEXT, "Circuit" TEXT, "City / State" TEXT, "Date" TEXT, "Winner" TEXT, "Team" TEXT)

Which driver won the Phillip Island Grand Prix Circuit?
SELECT "Winner" FROM table_78253 WHERE "Circuit" = 'phillip island grand prix circuit'
SELECT "Winner" FROM "table_78253" WHERE "Circuit" = 'phillip island grand prix circuit'