@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/causal_effects>
  skos:broader <https://concepts.sagepub.com/social-science/concept/randomized_control_trials> ;
  skos:prefLabel "causal effects"@en ;
  a skos:Concept .

<https://concepts.sagepub.com/social-science/concept/randomized_control_trials>
  skos:prefLabel "randomized control trials"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/causal_effects> .

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