user: Question: What class is associated with 0 stages won, a Hummer, and before 2009?
Columns: ['Year', 'Class', 'Vehicle', 'Position', 'Stages won']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2005.0, 'Cars', 'Volkswagen', '12', '0']
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Stages won" = '0' AND "Vehicle" = 'Hummer' AND "Year" < 2009.0;