user: Question: What is the team of driver Klaus Ludwig, who is class C1 and has more than 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 "Team" FROM "Table" WHERE "Class" = 'C1' AND "Laps" > 77.0 AND "Driver" = 'Klaus Ludwig';