CREATE TABLE table_70203 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

What is the chassis for a 1952 officine alfieri maserati with an entrant?
SELECT "Chassis" FROM table_70203 WHERE "Entrant" = 'officine alfieri maserati' AND "Year" = '1952'
SELECT "Chassis" FROM "table_70203" WHERE "Entrant" = 'officine alfieri maserati' AND "Year" = '1952'