@prefix dukems: . @prefix skos: . @prefix wd: . dukems:1 skos:notation "SOx" ; skos:prefLabel "Sulphur"@en ; a skos:Concept ; skos:narrower dukems:4 . dukems:4 skos:notation "H2SO4" ; a skos:Concept ; skos:exactMatch wd:Q4118 ; skos:altLabel "Sulfuric acid" ; skos:broader dukems:1 ; skos:prefLabel "Sulphuric acid"@en .