@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . <https://stad.gent/id/blank_node/81c521e7-a562-40a6-88f6-b6adb52419dd> rdfs:isDefinedBy <https://stad.gent/data/blank_node/81c521e7-a562-40a6-88f6-b6adb52419dd> .