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_41 ( week INTEGER, date VARCHAR, attendance VARCHAR )

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

### Accurate SQL ###

SELECT AVG(week) FROM table_name_41 WHERE date = "november 29, 1970" AND attendance < 31 OFFSET 427