@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_image_	skos:broader	isac:interactive_presentation_ .
isac:_video_	skos:broader	isac:interactive_presentation_ .
isac:_webinar_	skos:broader	isac:interactive_presentation_ .