user: Question: What class before 1990 has points of 33?
Columns: ['Year', 'Class', 'Team', 'Machine', 'Points', 'Wins']
Types: ['real', 'text', 'text', 'text', 'real', 'real']
Sample row: [1983.0, '500cc', 'Honda Britain', 'NS500', 0.0, 0.0]
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Year" < 1990.0 AND "Points" = 33.0;