@prefix dukems: . @prefix skos: . dukems:142 skos:related dukems:57 ; a skos:Concept ; skos:broader dukems:141 ; skos:prefLabel "1A Fuel Combustion Activities"@en . dukems:57 skos:prefLabel "1.A Combustion"@en ; a skos:Concept ; skos:related dukems:142 . dukems:141 skos:prefLabel "1.Energy"@en ; a skos:Concept ; skos:narrower dukems:142 .