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_81 (losses INTEGER, wins VARCHAR, league VARCHAR, season VARCHAR)

### Question ###
What is the losses in the NFL in the 2011 season with less than 13 wins?

### Accurate SQL ###

SELECT AVG(losses) FROM table_name_81 WHERE league = "nfl" AND season = 2011 AND wins < 13