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

<http://www.irandoc.acir/onto/irandoc/CHMTR000033>
  skos:prefLabel "آلاینده‌های نوع دوم"@fa, "secondary pollutants"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CHMTR000032> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000032>
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000220> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/CHMTR000033> ;
  skos:prefLabel "نیتریك اسید"@fa, "nitric acid"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/CHMTR000220>
  skos:prefLabel "نیتروژن"@fa, "nitrogen"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000032> .