CREATE TABLE table_51914 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What did the away team score when they visited south melbourne?
SELECT "Away team score" FROM table_51914 WHERE "Home team" = 'south melbourne'
SELECT "Away team score" FROM "table_51914" WHERE "Home team" = 'south melbourne'