CREATE TABLE table_58485 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Who was South Melbourne's away team opponents?
SELECT "Away team" FROM table_58485 WHERE "Home team" = 'south melbourne'
SELECT "Away team" FROM "table_58485" WHERE "Home team" = 'south melbourne'