CREATE TABLE table_43776 ("City" TEXT, "Country" TEXT, "IATA" TEXT, "ICAO" TEXT, "Airport" TEXT)

What is ICAO, when Airport is 'Sibulan Airport'?
SELECT "ICAO" FROM table_43776 WHERE "Airport" = 'sibulan airport'
SELECT "ICAO" FROM "table_43776" WHERE "Airport" = 'sibulan airport'