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

<http://www.irandoc.acir/onto/irandoc/insp0011963>
  skos:prefLabel "Vacuum tube"@en, "لامپ خلاء"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/insp0011962> .

<http://www.irandoc.acir/onto/irandoc/insp0011962>
  skos:altLabel "تریود"@fa, "" ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/insp0011963> ;
  skos:prefLabel "Triode"@en, "لامپ سه‌قطبی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .