@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<http://astrothesaurus.org/uat/1114>
  skos:altLabel "Laughing gas"@en, "N2O"@en, "Sweet air"@en ;
  skos:broader <http://astrothesaurus.org/uat/684> ;
  skos:prefLabel "Nitrous oxide"@en ;
  a skos:Concept .

<http://astrothesaurus.org/uat/684>
  skos:prefLabel "Greenhouse gases"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/1114> .