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

<http://www.irandoc.acir/onto/irandoc/chmtr000148>
  skos:broader <http://www.irandoc.acir/onto/irandoc/chmtr000150> ;
  skos:prefLabel "نخستین چاه نفت ایران"@fa, "iran's first oil well"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/chmtr000150>
  skos:prefLabel "oil well"@en, "چاه نفت"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/chmtr000148> .