user: Question: What's the size of Centerville in 89 Wayne county with an IHSAA class of AA in the year before 1974?
Columns: ['School', 'Location', 'Mascot', 'Size', 'IHSAA Class', '# / County', 'Year Joined', 'Previous Conference']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'real', 'text']
Sample row: ['Cambridge City Lincoln', 'Cambridge City', 'Golden Eagles', 367.0, 'AA', '89 Wayne', 1965.0, 'none (new school)']
SQL:

assistant: SELECT "Size" FROM "Table" WHERE "Year Joined" < 1974.0 AND "IHSAA Class" = 'AA' AND "# / County" = '89 Wayne' AND "School" = 'Centerville';