@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:printing_press_	skos:broader	isac:sheet-processing_machine_ .
isac:printing_machine_	skos:broader	isac:sheet-processing_machine_ .
isac:_diecutter_	skos:broader	isac:sheet-processing_machine_ .