user: Question: What is the county with an AA IHSAA class in Ferdinand?
Columns: ['School', 'Mascot', 'Location', 'Size', 'IHSAA Class', 'County']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Forest Park', 'Rangers', 'Ferdinand', 444.0, 'AA', '19 Dubois']
SQL:

assistant: SELECT "County" FROM "Table" WHERE "IHSAA Class" = 'AA' AND "Location" = 'Ferdinand';