What is the average number of weeks that the opponent was the Denver Broncos?
CREATE TABLE table_name_78 (
    week INTEGER,
    opponent VARCHAR
)
SELECT AVG(week) FROM table_name_78 WHERE opponent = "denver broncos"
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: What is the average number of weeks that the opponent was the Denver Broncos? ### Input: CREATE TABLE table_name_78 (
    week INTEGER,
    opponent VARCHAR
) ### Response: SELECT AVG(week) FROM table_name_78 WHERE opponent = "denver broncos"