user: Question: What's the least amount of points that Walter Wolf Racing had after 1974?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1966.0, 'Ken Tyrrell Racing', 'Matra MS5 F2', 'Cosworth Str-4', 0.0]
SQL:

assistant: SELECT MIN("Points") FROM "Table" WHERE "Year" > 1974.0 AND "Entrant" = 'Walter Wolf Racing';