@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

<https://concepts.sagepub.com/social-science/concept/narcotics>
  skos:prefLabel "narcotics"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/psychotropic_substance> .

<https://concepts.sagepub.com/social-science/concept/stimulants>
  skos:prefLabel "stimulants"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/psychotropic_substance> .

<https://concepts.sagepub.com/social-science/concept/tranquilisers>
  skos:prefLabel "tranquilisers"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/psychotropic_substance> .

<https://concepts.sagepub.com/social-science/concept/conceptgroup/concepts>
  a skos:Collection, isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member <https://concepts.sagepub.com/social-science/concept/psychotropic_substance> .

<https://concepts.sagepub.com/social-science/concept/psychotropic_substance>
  skos:narrower <https://concepts.sagepub.com/social-science/concept/tranquilisers>, <https://concepts.sagepub.com/social-science/concept/stimulants>, <https://concepts.sagepub.com/social-science/concept/narcotics> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/pharmaceutical_product> ;
  skos:prefLabel "psychotropic substance"@en ;
  a skos:Concept .

<https://concepts.sagepub.com/social-science/concept/pharmaceutical_product>
  skos:prefLabel "pharmaceutical product"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/psychotropic_substance> .