user: Question: What is Class, when Dates is "22 April - 3 May 2009"?
Columns: ['Place', 'Country', 'Qualifying Grand Prix', 'Class', 'Dates']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Torino', 'Italy', 'Torino Grand Prix', '15 meters', '15–22 June 2008']
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Dates" = '22 April - 3 May 2009';