user: Question: What are all the school years where class AAAA is in Gregory-Portland? 
Columns: ['School Year', 'Class A', 'Class AA', 'Class AAA', 'Class AAAA', 'Class AAAAA']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1990-91', 'Valley Mills', 'Canadian', 'Lampasas', 'Waco Midway', 'Lubbock']
SQL:

assistant: SELECT "School Year" FROM "Table" WHERE "Class AAAA" = 'Gregory-Portland';