@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_glass_	skos:broader	isac:sharp_material_ .
isac:_knife_	skos:broader	isac:sharp_material_ .
isac:sheet_metal_	skos:broader	isac:sharp_material_ .
isac:_needle_	skos:broader	isac:sharp_material_ .
isac:_steel_	skos:broader	isac:sharp_material_ .
isac:broken_glass_	skos:broader	isac:sharp_material_ .