user: ### NOW ANSWER:
Question: before 1995 waht is the aveage pts for 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 AVG("Pts.") FROM "Table" WHERE "Chassis" = 'mclaren mp4/10b' AND "Year" < 1995.0;