What's the mean week number for November 12, 1978?
CREATE TABLE table_name_9 (
    week INTEGER,
    date VARCHAR
)
SELECT AVG(week) FROM table_name_9 WHERE date = "november 12, 1978"
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's the mean week number for November 12, 1978? ### Input: CREATE TABLE table_name_9 (
    week INTEGER,
    date VARCHAR
) ### Response: SELECT AVG(week) FROM table_name_9 WHERE date = "november 12, 1978"