user: Question: What engine is used by Colin Bennett Racing with an 811 chassis?
Columns: ['Entrant', 'Constructor', 'Chassis', 'Engine', 'Driver']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Team Ensign', 'Ensign', 'N180B', 'Cosworth DFV V8', 'Jim Crawford']
SQL:

assistant: SELECT "Engine" FROM "Table" WHERE "Entrant" = 'Colin Bennett Racing' AND "Chassis" = '811';