@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . <https://stad.gent/id/blank_node/81a81968-de40-478a-b51d-ba837b637820> rdfs:isDefinedBy <https://stad.gent/data/blank_node/81a81968-de40-478a-b51d-ba837b637820> .