user: Question: Which Engine has a Team of Chesterfield Racing and include a Chassis of March 761?
Columns: ['Year', 'Team', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1975.0, 'Hesketh Racing', 'Hesketh 308', 'Ford Cosworth DFV 3.0 V8', 0.0]
SQL:

assistant: SELECT "Engine" FROM "Table" WHERE "Team" = 'Chesterfield Racing' AND "Chassis" = 'March 761';