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

<http://www.irandoc.acir/onto/irandoc/chmtr000400>
  skos:related <http://www.irandoc.acir/onto/irandoc/chmtr000067>, <http://www.irandoc.acir/onto/irandoc/chmtr000388> ;
  skos:prefLabel "نخستین واحد پتروشیمی ایران"@fa, "iran first petrochemical unit"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/chmtr000067>
  skos:prefLabel "پتروشیمی"@fa, "petrochemistry"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/chmtr000400> .

<http://www.irandoc.acir/onto/irandoc/chmtr000388>
  skos:prefLabel "نفت خام"@fa, "petroleum"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/chmtr000400> .