Who is the callsign that has ICAO of SCO?
CREATE TABLE table_name_68 (callsign VARCHAR, icao VARCHAR)
SELECT callsign FROM table_name_68 WHERE icao = "sco"
### Context: CREATE TABLE table_name_68 (callsign VARCHAR, icao VARCHAR) ### Question: Who is the callsign that has ICAO of SCO? ### Answer: SELECT callsign FROM table_name_68 WHERE icao = "sco"