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

<http://www.irandoc.acir/onto/irandoc/CAB0053817>
  skos:broader <http://www.irandoc.acir/onto/irandoc/CAB0053819> ;
  skos:prefLabel "نیتروژن دیوکسید"@fa, "nitrogen dioxide"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/CAB0053819>
  skos:prefLabel "نیتروژن اکسیدها"@fa, "nitrogen oxides"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CAB0053817> .