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_28985631_1 (month_sequence INTEGER, month_name VARCHAR)

### Question ###
What is the month sequence for the month name of av?

### Accurate SQL ###

SELECT MIN(month_sequence) FROM table_28985631_1 WHERE month_name = "Av"