user: ### NOW ANSWER:
Question: What year did Culver leave?
Columns: ['School', 'Location', 'Mascot', '# / County', 'Year joined', 'Previous conference', 'Year left', 'New conference']
Types: ['text', 'text', 'text', 'text', 'real', 'text', 'real', 'text']
Sample row: ['Caston', 'Fulton', 'Comets', '25 Fulton', 1971.0, 'Independents', 1978.0, 'joined Midwest']
SQL:

assistant: SELECT SUM("Year left") FROM "Table" WHERE "Location" = 'Culver';