user: Question: What was the sanction of the event at Nashville, Illinois?
Columns: ['Track Name', 'Location', 'Length', 'Sanction', 'Program']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Belleville Enduro Team', 'Belleville, Illinois', 'Multiple tracks', 'AMA', 'Various programs throughout the year']
SQL:

assistant: SELECT "Sanction" FROM "Table" WHERE "Location" = 'Nashville, Illinois';