user: Question: what AAAAA class has the school year of 1990-91?
Columns: ['School Year', 'Class A', 'Class AA', 'Class AAA', 'Class AAAA', 'Class AAAAA']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1980-81', 'Paint Rock', 'Wolfe City', 'New Braunfels', 'Brownfield', 'Houston Westchester']
SQL:

assistant: SELECT "Class AAAAA" FROM "Table" WHERE "School Year" = '1990-91';