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

<http://astrothesaurus.org/uat/580>
  skos:broader <http://astrothesaurus.org/uat/594> ;
  skos:prefLabel "Galaxy chemical evolution"@en ;
  skos:narrower <http://astrothesaurus.org/uat/225> ;
  a skos:Concept .

<http://astrothesaurus.org/uat/225>
  skos:prefLabel "Chemical enrichment"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/580> .

<http://astrothesaurus.org/uat/594>
  skos:prefLabel "Galaxy evolution"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/580> .