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

<http://iconclass.org/49L51%28%2B52%29> skos:broader <http://iconclass.org/49L51%28%2B5%29> ;
    skos:narrower <http://iconclass.org/49L51%28%2B52%28%29> ;
    skos:prefLabel "pen (+ tools, instruments; laboratory equipment ~ scientific research)"@en .