CREATE TABLE table_55054 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the highest crowd number of the game where the away team was south melbourne?
SELECT MAX("Crowd") FROM table_55054 WHERE "Away team" = 'south melbourne'
SELECT MAX("Crowd") FROM "table_55054" WHERE "Away team" = 'south melbourne'