@prefix rdf: . @prefix bibo: . _:vb585506 rdf:first bibo:Document ; rdf:rest rdf:nil . @prefix pwdr: . @prefix ns3: . _:vb585506 pwdr:describedby ns3:abstract . _:vb585507 rdf:first bibo:Collection ; rdf:rest _:vb585506 ; pwdr:describedby ns3:abstract .