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

<http://www.irandoc.acir/onto/irandoc/HZA000776>
  skos:prefLabel "لجن"@fa, "sludge"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/HZA000774> .

<http://www.irandoc.acir/onto/irandoc/HZA000774>
  skos:broader <http://www.irandoc.acir/onto/irandoc/HZA000776> ;
  skos:prefLabel "acid sludge"@en, "لجن اسیدی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .