@prefix skos: <http://www.w3.org/2004/02/skos/core#> . <https://stad.gent/id/concept/550008815/2023-12-22T00:01:12.899Z> skos:narrower <https://stad.gent/id/concept/550012120> . <https://stad.gent/id/concept/550012120> skos:prefLabel "polyethyleen"@nl .