CREATE TABLE table_7678 ("Driver" TEXT, "Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Engine" TEXT)

What was the Chassis constructed by Maserati, when the Entrant was Officine A. Maserati, and when the Driver was Luigi Fagioli?
SELECT "Chassis" FROM table_7678 WHERE "Constructor" = 'maserati' AND "Entrant" = 'officine a. maserati' AND "Driver" = 'luigi fagioli'
SELECT "Chassis" FROM "table_7678" WHERE "Constructor" = 'maserati' AND "Driver" = 'luigi fagioli' AND "Entrant" = 'officine a. maserati'