CREATE TABLE table_51592 ("City" TEXT, "Country" TEXT, "IATA" TEXT, "ICAO" TEXT, "Airport" TEXT)

What is the IATA of Leonardo da Vinci-Fiumicino Airport?
SELECT "IATA" FROM table_51592 WHERE "Airport" = 'leonardo da vinci-fiumicino airport'
SELECT "IATA" FROM "table_51592" WHERE "Airport" = 'leonardo da vinci-fiumicino airport'