user: Question: Which chassis-engine had 77 laps?
Columns: ['Class', 'Team', 'Driver', 'Chassis – Engine', 'Laps']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['C1', 'Blaupunkt Joest Racing', 'Klaus Ludwig', 'Porsche 956 B', 79.0]
SQL:

assistant: SELECT "Chassis – Engine" FROM "Table" WHERE "Laps" = 77.0;