@prefix rdf: . @prefix xsd: . @prefix dcterms: . @prefix skos: . @prefix rdfs: . @prefix api: . @prefix foaf: . a skos:Concept , rdfs:Resource ; dcterms:contributor ; dcterms:modified "2018-02-06T18:40:59.000Z"^^xsd:dateTime ; skos:altLabel "Alfvén surface waves"@en , "Alfven surface waves"@en , "Alfvén waves"@en ; skos:broader , ; skos:prefLabel "Alfven waves"@en . skos:narrower . skos:narrower . a api:ItemEndpoint , api:Page ; api:definition ; api:extendedMetadataVersion ; foaf:primaryTopic .