@prefix rdf: . @prefix xsd: . @prefix dcterms: . @prefix skos: . @prefix rdfs: . @prefix api: . @prefix foaf: . a rdfs:Resource , skos:Concept ; dcterms:contributor ; dcterms:modified "2018-09-20T21:23:05.000Z"^^xsd:dateTime ; skos:altLabel "Gamma-ray astronomical observations"@en , "γ-ray astronomy"@en , "Gamma ray astronomical observations"@en , "Gamma astronomy"@en , "Gamma ray astronomy"@en ; skos:broader ; skos:prefLabel "Gamma-ray astronomy"@en ; skos:related . skos:narrower . skos:related . a api:ItemEndpoint , api:Page ; api:definition ; api:extendedMetadataVersion ; foaf:primaryTopic .