CREATE TABLE table_41621 ("City" TEXT, "Country" TEXT, "IATA" TEXT, "ICAO" TEXT, "Airport" TEXT)

What is the ICAO for Riyadh, Saudi Arabia?
SELECT "ICAO" FROM table_41621 WHERE "Country" = 'saudi arabia' AND "City" = 'riyadh'
SELECT "ICAO" FROM "table_41621" WHERE "City" = 'riyadh' AND "Country" = 'saudi arabia'