@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_example_3	skos:broader	isac:_example_4 .
isac:_example_	skos:broader	isac:_example_4 .
isac:_layer_	skos:broader	isac:_example_4 .