user: Question: What chassis is used in 1989 with a Cosworth engine?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1988.0, 'Forti Corse', 'Dallara 3087', 'Cosworth', 0.0]
SQL:

assistant: SELECT "Chassis" FROM "Table" WHERE "Year" = 1989.0 AND "Engine" = 'Cosworth';