user: Question: which # / county is correct for year less than 1981 and Chalmers as location?
Columns: ['School', 'Location', 'Mascot', '# / County', 'IHSAA Class', 'Year Joined', 'Previous Conference']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Caston', 'Fulton', 'Comets', '25 Fulton', 'A', 1978.0, 'Three Rivers']
SQL:

assistant: SELECT "# / County" FROM "Table" WHERE "Year Joined" < 1981.0 AND "Location" = 'Chalmers';