Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_40 (attendance INTEGER, date VARCHAR, week VARCHAR)

### Question ###
What was the average number of attendance for the game on November 29, 1981 played after week 13?

### Accurate SQL ###

SELECT AVG(attendance) FROM table_name_40 WHERE date = "november 29, 1981" AND week > 13