@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix skos: <http://www.w3.org/2004/02/skos/core#> . <http://mu.semte.ch/blank#3e7fab72-2d97-4727-8171-d36c602f6b9b> rdf:type skos:Concept ; <http://www.cidoc-crm.org/cidoc-crm/P2_has_type> <http://vocab.getty.edu/aat/300014495> , <https://www.projectcest.be/wiki/Publicatie:Invulboek_objecten/Veld/Term_materials> .