CREATE TABLE table_58884 ("Circuit" TEXT, "City / State" TEXT, "Date" TEXT, "Winner" TEXT, "Team" TEXT)

What is City / State, when Winner is 'Rohan Onslow', and when Circuit is 'Oran Park Raceway'?
SELECT "City / State" FROM table_58884 WHERE "Winner" = 'rohan onslow' AND "Circuit" = 'oran park raceway'
SELECT "City / State" FROM "table_58884" WHERE "Circuit" = 'oran park raceway' AND "Winner" = 'rohan onslow'