CREATE TABLE table_53173 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Date" TEXT)

What was the home team's score of the game where South Melbourne is the away team?
SELECT "Home team score" FROM table_53173 WHERE "Away team" = 'south melbourne'
SELECT "Home team score" FROM "table_53173" WHERE "Away team" = 'south melbourne'