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

<http://astrothesaurus.org/uat/451>
  skos:prefLabel "Einstein rings"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/943> .

<http://astrothesaurus.org/uat/943>
  skos:broader <http://astrothesaurus.org/uat/451> ;
  skos:prefLabel "Luminous arcs"@en ;
  a skos:Concept .