Question: What circuit was the Clipsal 500 on?
SQL: SELECT "Circuit" FROM "1-25531112-2" WHERE "Event" = 'Clipsal 500';

Question: Who made the challenge on the Albert Park Grand Prix Circuit?
SQL: SELECT "Challenge" FROM "1-25531112-2" WHERE "Circuit" = 'Albert Park Grand Prix Circuit';

Question: In what round was the circuit Eastern Creek Raceway?
SQL: SELECT "Rd." FROM "1-25531112-2" WHERE "Circuit" = 'Eastern Creek Raceway';

Question: Who made the challenge in the Australian Grand Prix?
SQL: SELECT "Challenge" FROM "1-25531112-2" WHERE "Event" = 'Australian Grand Prix';