@prefix oefos: . @prefix skos: . oefos:2073 skos:notation "2073" ; skos:prefLabel "Mining, Petroleum Engineering"@en, "Bergbau, Erdölgewinnung"@de ; a skos:Concept ; skos:narrower oefos:207305 . oefos:Schema a skos:ConceptScheme . oefos:207305 skos:inScheme oefos:Schema ; skos:broader oefos:2073 ; skos:notation "207305" ; skos:prefLabel "Natural gas engineering"@en, "Erdgastechnik"@de ; a skos:Concept .