@prefix rdf: . @prefix owl: . _:vb588680 rdf:type owl:Class ; owl:unionOf _:vb588682 . @prefix pwdr: . @prefix ns3: . _:vb588680 pwdr:describedby ns3:abstract . @prefix bibo: . _:vb588681 rdf:first bibo:Document ; rdf:rest rdf:nil ; pwdr:describedby ns3:abstract . _:vb588682 rdf:first bibo:Collection ; rdf:rest _:vb588681 ; pwdr:describedby ns3:abstract .