@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_chart_	skos:broader	<http://webisa.webdatacommons.org/concept/stack+bar_chart_> .
isac:_graph_	skos:broader	<http://webisa.webdatacommons.org/concept/stack+bar_chart_> .