@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<http://iconclass.org/49L6453%28%2B54%29> skos:broader <http://iconclass.org/49L6453%28%2B5%29> ;
    skos:narrower <http://iconclass.org/49L6453%28%2B541%29> ;
    skos:prefLabel "slate (writing material) (+ experiment ~ scientific research)"@en .