@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/alternative_fuels>
  skos:definition "The idea of mechanical vehicles for roads once dominated by horses is an old one. It dates back to at least the 15th century, when famed artist Leonardo da Vinci made sketches of self-propelled wagons. [Source: <a href=\"https://sk.sagepub.com/reference/encyclopedia-of-transportation/n53.xml\" target=\"_blank\" data-id=\"to-sk\">Encyclopedia of Transportation: Social Science and Policy; Alternative Fuels</a>]"@en ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/fuel> ;
  skos:prefLabel "alternative fuels"@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/alternative_fuels> .

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