Distinct objects for predicate ns4:icao sorted by frequency with mapping to SKOS

Resource	Count	SKOS mapping
"KLM"@nl	4
"EHAM"@nl	2
"NWA"@nl	2
"SAS"@nl	2
"DLH"@nl	1
"KAL"@nl	1
"KORD"@nl	1
"RPLC"@nl	1
"SWR"@nl	1
"WICC"@nl	1