CREATE TABLE table_56818 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Engine \\u2020" TEXT, "Tyre" TEXT, "Driver" TEXT, "Rounds" TEXT)

What engine did David Coulthard have in his mp4-13 chassis?
SELECT "Engine \u2020" FROM table_56818 WHERE "Chassis" = 'mp4-13' AND "Driver" = 'david coulthard'
SELECT "Engine \u2020" FROM "table_56818" WHERE "Chassis" = 'mp4-13' AND "Driver" = 'david coulthard'