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

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'