@prefix rdf: . @prefix xsd: . @prefix dcterms: . @prefix skos: . @prefix rdfs: . @prefix api: . @prefix foaf: . skos:narrower . a rdfs:Resource , skos:Concept ; dcterms:contributor ; dcterms:created "2017-01-23T20:12:14.000Z"^^xsd:dateTime ; dcterms:creator ; dcterms:modified "2020-11-04T14:48:28.033Z"^^xsd:dateTime ; skos:broader ; skos:definition "A main-sequence star, usually of spectral class B to F, whose spectrum shows bright emission lines superimposed on the normal absorption lines. The emission spectrum is explained by the presence of a circumstellar shell of gas surrounding the star at the equator. Shell stars are fast rotators."@en ; skos:prefLabel "Shell stars"@en . a api:ItemEndpoint , api:Page ; api:definition ; api:extendedMetadataVersion ; foaf:primaryTopic .