user: Question: What team uses a Cosworth DFV V8 engine and DN9 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 "Entrant" FROM "Table" WHERE "Engine" = 'Cosworth DFV V8' AND "Chassis" = 'DN9';