Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Who was the opponent on the date of November 29, 1970 and the attendance was less than 31,427?

### Inputs:
table_name: table, columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']

### Response:
SELECT AVG Week FROM table WHERE Date = november 29, 1970 AND Attendance < 31,427