What's the mean week number when attendance was 63,263?
CREATE TABLE table_name_88 (
    week INTEGER,
    attendance VARCHAR
)
SELECT AVG(week) FROM table_name_88 WHERE attendance = 63 OFFSET 263
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 when attendance was 63,263? ### Input: CREATE TABLE table_name_88 (
    week INTEGER,
    attendance VARCHAR
) ### Response: SELECT AVG(week) FROM table_name_88 WHERE attendance = 63 OFFSET 263