user: Question: WhAt is the primAry conference with A IHSAA FootbAll ClAss of A, At South Decatur school?
Columns: ['School', 'Location', 'Mascot', 'Enrollment', 'IHSAA Football Class', 'Primary Conference', 'County']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['Eastern Hancock', 'Charlottesville', 'Royals', 355.0, 'A', 'Independent', '30 Hancock']
SQL:

assistant: SELECT "Primary Conference" FROM "Table" WHERE "IHSAA Football Class" = 'A' AND "School" = 'South Decatur';