user: Question: Before 1956, what Chassis has Gordini Straight-4 engine with 3 points?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1950.0, 'Equipe Simca Gordini', 'Simca Gordini Type 15', 'Gordini Straight-4', 3.0]
SQL:

assistant: SELECT "Chassis" FROM "Table" WHERE "Year" < 1956.0 AND "Engine" = 'Gordini Straight-4' AND "Points" = 3.0;