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

<http://astrothesaurus.org/uat/50>
  skos:prefLabel "Ap stars"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/744> .

<http://astrothesaurus.org/uat/744>
  skos:broader <http://astrothesaurus.org/uat/50> ;
  skos:prefLabel "Holmium stars"@en ;
  a skos:Concept .