@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/methamphetamine>
  skos:definition "Methamphetamine is a powerful member of the amphetamine class of stimulant drugs. Amphetamines, including methamphetamine, were widely produced as prescription and over-the-counter drugs for a wide range of ailments and conditions by the mid-20th century. [Source: <a href=\"https://sk.sagepub.com/reference/drugpolicy/n224.xml\" target=\"_blank\" data-id=\"to-sk\">Encyclopedia of Drug Policy; Methamphetamine</a>]"@en ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/types_of_drugs>, <https://concepts.sagepub.com/social-science/concept/drugs>, <https://concepts.sagepub.com/social-science/concept/drug_classification>, <https://concepts.sagepub.com/social-science/concept/controlled_drugs> ;
  skos:prefLabel "methamphetamine"@en ;
  a skos:Concept .

<https://concepts.sagepub.com/social-science/concept/drug_classification>
  skos:prefLabel "drug classification"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/methamphetamine> .

<https://concepts.sagepub.com/social-science/concept/drugs>
  skos:prefLabel "drugs"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/methamphetamine> .

<https://concepts.sagepub.com/social-science/concept/controlled_drugs>
  skos:prefLabel "controlled drugs"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/methamphetamine> .

<https://concepts.sagepub.com/social-science/concept/types_of_drugs>
  skos:prefLabel "types of drugs"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/methamphetamine> .

<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/methamphetamine> .