@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_oil_	skos:broader	isac:engineering_solution_ .
isac:_grade_	skos:broader	isac:engineering_solution_ .
isac:_gas_	skos:broader	isac:engineering_solution_ .
isac:_there_	skos:broader	isac:engineering_solution_ .
isac:_prototype_	skos:broader	isac:engineering_solution_ .
isac:product_design_	skos:broader	isac:engineering_solution_ .