user: Question: What was the average number of attendance for the game on november 29, 1981 played after week 13?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 6, 1981', 'New Orleans Saints', 'W 27-0', 57406.0]
SQL:

assistant: SELECT AVG("Attendance") FROM "Table" WHERE "Date" = 'november 29, 1981' AND "Week" > 13.0;