CREATE TABLE table_54686 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

When the Away team is melbourne, what venue do they play at?
SELECT "Venue" FROM table_54686 WHERE "Away team" = 'melbourne'
SELECT "Venue" FROM "table_54686" WHERE "Away team" = 'melbourne'