CREATE TABLE table_53660 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Tyre" TEXT, "Driver" TEXT, "Rounds" TEXT)

Who was the constructor of the officine alfieri maserati that was driven by Sergio Mantovani?
SELECT "Constructor" FROM table_53660 WHERE "Entrant" = 'officine alfieri maserati' AND "Driver" = 'sergio mantovani'
SELECT "Constructor" FROM "table_53660" WHERE "Driver" = 'sergio mantovani' AND "Entrant" = 'officine alfieri maserati'