@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_web_	skos:broader	isac:normal_usage_ .
isac:_email_	skos:broader	isac:normal_usage_ .
isac:_youtube_	skos:broader	isac:normal_usage_ .