CREATE TABLE table_27218 ("Round" TEXT, "Opposition" TEXT, "Time" TEXT, "Date" TEXT, "Home/Away" TEXT, "Venue" TEXT, "Score" TEXT, "Result/Margin" TEXT, "Broadcaster" TEXT, "TV" TEXT, "Ladder Position" TEXT)

Which network broadcast the game when the Western Bulldogs played melbourne?
SELECT "Broadcaster" FROM table_27218 WHERE "Opposition" = 'Melbourne'
SELECT "Broadcaster" FROM "table_27218" WHERE "Opposition" = 'Melbourne'