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_86 ( lead_margin INTEGER, dates_administered VARCHAR )

### Question ###
Name the average Lead Margin on november 13-november 19, 2007?

### Accurate SQL ###

SELECT AVG(lead_margin) FROM table_name_86 WHERE dates_administered = "november 13-november 19, 2007"