CREATE TABLE table_31776 ("City" CLOB, "Country" CLOB, "IATA" CLOB, "ICAO" CLOB, "Airport" CLOB)

Tell me the icao of isla grande
SELECT "ICAO" FROM table_31776 WHERE "City" = 'isla grande'
SELECT "ICAO" FROM "table_31776" WHERE "City" = 'isla grande'