@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/middle_school>
  skos:prefLabel "middle school"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/lower_secondary_education> .

<https://concepts.sagepub.com/social-science/concept/junior_high_school>
  skos:prefLabel "junior high school"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/lower_secondary_education> .

<https://concepts.sagepub.com/social-science/concept/lower_secondary_education>
  skos:narrower <https://concepts.sagepub.com/social-science/concept/middle_school>, <https://concepts.sagepub.com/social-science/concept/junior_high_school> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/secondary_education> ;
  skos:prefLabel "lower secondary education"@en ;
  a skos:Concept .

<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/lower_secondary_education> .

<https://concepts.sagepub.com/social-science/concept/secondary_education>
  skos:prefLabel "secondary education"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/lower_secondary_education> .