user: Question: What kind of Chassis supports a Maserati Straight-6 engine with Points greater than 0 and built in the year 1955?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1953.0, 'Equipe Gordini', 'Gordini Type 16', 'Gordini Straight-6', 0.0]
SQL:

assistant: SELECT "Chassis" FROM "Table" WHERE "Engine" = 'Maserati Straight-6' AND "Points" > 0.0 AND "Year" = 1955.0;