CREATE TABLE table_53456 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What was the smallest crowd when Melbourne was the away team?
SELECT MIN("Crowd") FROM table_53456 WHERE "Away team" = 'melbourne'
SELECT MIN("Crowd") FROM "table_53456" WHERE "Away team" = 'melbourne'