user: Question: What chassis did Gordon Johncock use with his Cosworth engine?
Columns: ['Team', 'Chassis', 'Engine', 'Tires', 'Drivers']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Sugaripe Prune', 'McLaren', 'Cosworth', 'G', 'Tom Sneva']
SQL:

assistant: SELECT "Chassis" FROM "Table" WHERE "Engine" = 'Cosworth' AND "Drivers" = 'Gordon Johncock';