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

<http://astrothesaurus.org/uat/433>
  skos:prefLabel "Early astronomical instruments"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/1303> .

<http://astrothesaurus.org/uat/1303>
  skos:broader <http://astrothesaurus.org/uat/433> ;
  skos:prefLabel "Ptolemy stones"@en ;
  a skos:Concept .