user: Question: What was the highest amount of laps for class C1 and driver Derek Bell?
Columns: ['Class', 'Team', 'Driver', 'Chassis – Engine', 'Laps']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['C1', 'Silk Cut Jaguar', 'Raul Boesel', 'Jaguar XJR-8', 77.0]
SQL:

assistant: SELECT MAX("Laps") FROM "Table" WHERE "Class" = 'C1' AND "Driver" = 'Derek Bell';