@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . <https://stad.gent/id/blank_node/b21a18ad-993a-442e-a4af-67e64849fc07> rdfs:isDefinedBy <https://stad.gent/data/blank_node/b21a18ad-993a-442e-a4af-67e64849fc07> .