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

<http://www.irandoc.acir/onto/irandoc/hza000776>
  skos:prefLabel "sludge"@en, "لجن"@fa ;
  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 "لجن اسیدی"@fa, "acid sludge"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .