user: Question: Can you say what was the entrant of Maserati built item with a Tyre of P with a chassis of 250F A6GCM that was driven by Luigi Villoresi?
Columns: ['Entrant', 'Constructor', 'Chassis', 'Tyre', 'Driver', 'Rounds']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Officine Alfieri Maserati', 'Maserati', '250F A6GCM', 'P', 'Juan Manuel Fangio', '1, 3']
SQL:

assistant: SELECT "Entrant" FROM "Table" WHERE "Constructor" = 'Maserati' AND "Tyre" = 'P' AND "Chassis" = '250F A6GCM' AND "Driver" = 'Luigi Villoresi';