CREATE TABLE table_28956 ("Rd." CLOB, "Circuit" CLOB, "City / State" CLOB, "Date" CLOB, "Championship" CLOB, "Challenge" CLOB, "Production" CLOB)

Which city and state hosted the adelaide street circuit?
SELECT "City / State" FROM table_28956 WHERE "Circuit" = 'Adelaide Street Circuit'
SELECT "City / State" FROM "table_28956" WHERE "Circuit" = 'Adelaide Street Circuit'