CREATE TABLE table_14476 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" TEXT)

What engine did the mclaren mp4-20 use?
SELECT "Engine" FROM table_14476 WHERE "Chassis" = 'mclaren mp4-20'
SELECT "Engine" FROM "table_14476" WHERE "Chassis" = 'mclaren mp4-20'