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

<http://www.irandoc.acir/onto/irandoc/CAB0004519>
  skos:altLabel "gas, natural"@en ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CAB0004518> ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CAB0053323> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/CAB0004526> ;
  skos:prefLabel "گاز طبیعی"@fa, "natural gas"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/CAB0004518>
  skos:prefLabel "بیوگاز"@fa, "biogas"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/CAB0004519> .

<http://www.irandoc.acir/onto/irandoc/CAB0053323>
  skos:prefLabel "متان"@fa, "methane"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CAB0004519> .

<http://www.irandoc.acir/onto/irandoc/CAB0004526>
  skos:prefLabel "سوخت"@fa, "fuels"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CAB0004519> .