user: Question: What is the greatest point of an Entrant of connaught engineering alta straight-4 engine before 1957
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1957.0, 'Connaught Engineering', 'Connaught Type B', 'Alta Straight-4', 0.0]
SQL:

assistant: SELECT MAX("Points") FROM "Table" WHERE "Engine" = 'alta straight-4' AND "Entrant" = 'connaught engineering' AND "Year" < 1957.0;