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_10815352_1 (average_attendance INTEGER, season VARCHAR)

### Question ###
What's the average attendance of the leagues in the season of 2013?

### Accurate SQL ###

SELECT MIN(average_attendance) FROM table_10815352_1 WHERE season = "2013"