PREFIX arg: PREFIX foaf: PREFIX v: PREFIX vivo: CONSTRUCT { ?vcard v:hasTelephone _:fax . _:fax a v:Telephone . _:fax a v:Fax. _:fax v:telephone ?faxNumber . } WHERE { ?s vivo:faxNumber ?faxNumber . ?s arg:ARG_2000028 ?vcard . FILTER NOT EXISTS { ?vcard v:hasTelephone ?faxNode . ?faxNode a v:Fax . } }