@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_ladder_	skos:broader	isac:work_platform_ .
isac:_scaffold_	skos:broader	isac:work_platform_ .
isac:_scaffolding_	skos:broader	isac:work_platform_ .
isac:scissor_lift_	skos:broader	isac:work_platform_ .
isac:scaffold_platform_	skos:broader	isac:work_platform_ .