CREATE TABLE table_56108 ("Week" CLOB, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Kickoff [a ]" CLOB, "Game site" CLOB, "Attendance" CLOB, "Record" CLOB)

Who is the opponent on the game that will be played at metropolitan stadium?
SELECT "Opponent" FROM table_56108 WHERE "Game site" = 'metropolitan stadium'
SELECT "Opponent" FROM "table_56108" WHERE "Game site" = 'metropolitan stadium'