CREATE TABLE table_80084 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

Who used Gordini Straight-6 in 1956?
SELECT "Entrant" FROM table_80084 WHERE "Engine" = 'gordini straight-6' AND "Year" = '1956'
SELECT "Entrant" FROM "table_80084" WHERE "Engine" = 'gordini straight-6' AND "Year" = '1956'