@prefix rdfs: . @prefix owl: . @prefix gacs: . @prefix skos: . @prefix rdf: . @prefix dc: . rdfs:label "Concept definition"@en ; a owl:Class . gacs:C25502 skos:definition gacs:def_c5f18e6e . gacs:def_c5f18e6e rdf:value "Transport of people and goods by aircraft."@en ; dc:source ; a .