@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ns0: <http://rdf-vocabulary.ddialliance.org/xkos#> .

<http://www.irandoc.acir/onto/irandoc/AGR0005180>
  skos:prefLabel "Heavy metals"@en, "فلزات سنگین"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  ns0:has_related <http://www.irandoc.acir/onto/irandoc/AGR0005167> ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/AGR0005167> .

<http://www.irandoc.acir/onto/irandoc/AGR0005167>
  skos:prefLabel "Radium"@en, "رادیم"@fa ;
  skos:altLabel "Ra (نشانه)"@fa, "Ra (symbol)"@en ;
  a skos:Concept, <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/AGR0005180>, <http://www.irandoc.acir/onto/irandoc/AGR0005193> ;
  skos:scopeNote "Ra (نشانه)"@fa, "Ra (symbol)"@en .

<http://www.irandoc.acir/onto/irandoc/AGR0005193>
  skos:prefLabel "Alkaline earth metals"@en, "فلزات قلیایی خاک‌ها"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/AGR0005167> .