@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:oil_change_	skos:broader	isac:engine_work_ .
isac:_engine_	skos:broader	isac:engine_work_ .
isac:_cam_	skos:broader	isac:engine_work_ .