CREATE TABLE table_51599 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

When South Melbourne was the Away Team, what was their score?
SELECT "Away team score" FROM table_51599 WHERE "Away team" = 'south melbourne'
SELECT "Away team score" FROM "table_51599" WHERE "Away team" = 'south melbourne'