@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/sleep_by_age>
  skos:definition "Sleep is an immediately reversible state characterized by a separation between the conscious mind and the world outside and can be measured by changes in brain waves on an electroencephalogram (EEG). Daytime functioning is affected by sleep duration (hours of sleep per night) and sleep. [Source: <a href=\"https://sk.sagepub.com/reference/encyclopedia-of-school-health/n257.xml\" target=\"_blank\" data-id=\"to-sk\">Encyclopedia of School Health; Sleep by Age</a>]"@en ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/developmental_surveillance> ;
  skos:prefLabel "sleep by age"@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/sleep_by_age> .

<https://concepts.sagepub.com/social-science/concept/developmental_surveillance>
  skos:prefLabel "developmental surveillance"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/sleep_by_age> .