@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/leisure_facilities>
  skos:prefLabel "leisure facilities"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/playgrounds> .

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

<https://concepts.sagepub.com/social-science/concept/play_areas>
  skos:prefLabel "play areas"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/playgrounds> .

<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/playgrounds> .

<https://concepts.sagepub.com/social-science/concept/history_of_education>
  skos:prefLabel "history of education"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/playgrounds> .

<https://concepts.sagepub.com/social-science/concept/playgrounds>
  skos:definition "Although play has been an important aspect of children's lives for as long as humans have existed, organized playgrounds are a relatively recent invention. American playgrounds date back to the 1880s. [Source: <a href=\"https://sk.sagepub.com/reference/urbanhistory/n323.xml\" target=\"_blank\" data-id=\"to-sk\">Encyclopedia of American Urban History; Playgrounds</a>]"@en ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/adventure_playgrounds> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/play_areas>, <https://concepts.sagepub.com/social-science/concept/leisure_facilities>, <https://concepts.sagepub.com/social-science/concept/history_of_education> ;
  skos:prefLabel "playgrounds"@en ;
  a skos:Concept .