Distinct subjects for predicate ns4:icao sorted by frequency

Resource	Count
Koninklijke Luchtvaart Maatschappij	4
Luchthaven Schiphol	2
Northwest Airlines	2
Scandinavian Airlines	2
Diosdado Macapagal International Airport	1
Korean Air	1
Luchthaven Husein Sastranegara	1
Lufthansa	1
O'Hare International Airport	1
Swiss International Air Lines	1