user: Question: Name the class aa for 1998-99
Columns: ['School Year', 'Class A', 'Class AA', 'Class AAA', 'Class AAAA', 'Class AAAAA']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1988-89', 'Plains', 'Shallowater', 'Quitman', 'Wichita Falls Hirschi', 'McAllen']
SQL:

assistant: SELECT "Class AA" FROM "Table" WHERE "School Year" = '1998-99';