user: Question: How many points were earned with a Chassis of a ferrari 156?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1960.0, 'Scuderia Ferrari', 'Ferrari Dino 246', 'Ferrari V6', 4.0]
SQL:

assistant: SELECT SUM("Points") FROM "Table" WHERE "Chassis" = 'ferrari 156';