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

<http://www.irandoc.acir/onto/irandoc/CHMTR000389>
  skos:prefLabel "سوخت‌ فسیلی"@fa, "fossil fuel"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CHMTR000387> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000387>
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CHMTR000385>, <http://www.irandoc.acir/onto/irandoc/CHMTR000231>, <http://www.irandoc.acir/onto/irandoc/CHMTR000384>, <http://www.irandoc.acir/onto/irandoc/CHMTR000383> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/CHMTR000389> ;
  skos:prefLabel "natural gases"@en, "گاز‌های طبیعی"@fa ;
  a skos:Concept, <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept> ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000129> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000231>
  skos:prefLabel "متان"@fa, "methane"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/CHMTR000387> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000385>
  skos:prefLabel "C.N.G"@en, "سی.ان.جی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/CHMTR000387> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000129>
  skos:prefLabel "فراورده‌های پتروشیمیایی"@fa, "petrochemical products"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000387> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000383>
  skos:prefLabel "ethane"@en, "اتان"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/CHMTR000387> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000384>
  skos:prefLabel "propane"@en, "پروپان"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/CHMTR000387> .