user: ### NOW ANSWER:
Question: waht is the last year with a McLaren MP4/10B chassis
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Pts.']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1991.0, 'Motor Racing Developments Ltd', 'Brabham BT59Y', 'Yamaha V12', 1.0]
SQL:

assistant: SELECT MAX("Year") FROM "Table" WHERE "Chassis" = 'McLaren MP4/10B';