user: Question: What Entrant has a 1952 Maserati Straight-6 engine?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1950.0, 'Scuderia Milano', 'Maserati 4CLT/50', 'Maserati Straight-4', 2.0]
SQL:

assistant: SELECT "Entrant" FROM "Table" WHERE "Engine" = 'Maserati Straight-6' AND "Year" = 1952.0;