user: Question: What is the IHSAA Football Class for county 67 Putnam at Greencastle?
Columns: ['School', 'Location', 'Mascot', 'Enrollment', 'IHSAA Class', 'IHSAA Football Class', 'County']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['Cascade', 'Clayton', 'Cadets', 533.0, 'AA', 'AA', '33 Hendricks']
SQL:

assistant: SELECT "IHSAA Football Class" FROM "Table" WHERE "County" = '67 Putnam' AND "School" = 'Greencastle';