Who was the opponent before week 6 at cleveland municipal stadium?
CREATE TABLE table_name_19 (
    opponent VARCHAR,
    week VARCHAR,
    game_site VARCHAR
)
SELECT opponent FROM table_name_19 WHERE week < 6 AND game_site = "cleveland municipal stadium"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Who was the opponent before week 6 at cleveland municipal stadium? ### Input: CREATE TABLE table_name_19 (
    opponent VARCHAR,
    week VARCHAR,
    game_site VARCHAR
) ### Response: SELECT opponent FROM table_name_19 WHERE week < 6 AND game_site = "cleveland municipal stadium"