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

<http://www.irandoc.acir/onto/irandoc/CAB0054026>
  skos:broader <http://www.irandoc.acir/onto/irandoc/CAB0054031> ;
  skos:prefLabel "ایتربیم"@fa, "ytterbium"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/CAB0054031>
  skos:prefLabel "عناصر خاکی کمیاب"@fa, "rare earth elements"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CAB0054026> .