Question: Find the names of stadiums that some Australian swimmers have been to.
SQL: SELECT t4.name FROM swimmer AS t1 JOIN record AS t2 ON t1.id  =  t2.swimmer_id JOIN event AS t3 ON t2.event_id  =  t3.id JOIN stadium AS t4 ON t4.id  =  t3.stadium_id WHERE t1.nationality  =  'Australia'