CREATE TABLE table_57508 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is south melbourne's scores when they are the away team?
SELECT "Away team score" FROM table_57508 WHERE "Away team" = 'south melbourne'
SELECT "Away team score" FROM "table_57508" WHERE "Away team" = 'south melbourne'