@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_paper_	skos:broader	isac:printer_problem_ .
isac:paper_jam_	skos:broader	isac:printer_problem_ .
isac:ink_problem_	skos:broader	isac:printer_problem_ .