_:vb87700 . _:vb87698 _:vb87699 . _:vb87698 . _:vb87700 . _:vb87703 _:vb87698 . _:vb87694 . _:vb87702 _:vb87700 . _:vb87701 . _:vb87701 "application/rdf+xml; q=1.0, text/rdf+n3; q=0.9, application/rdf+turtle; q=0.5, application/x-turtle; q=0.6, application/turtle; q=0.5, text/turtle; q=1.0, application/xml; q=0.2, */*; q=0.1" . _:vb87696 . _:vb87694 _:vb87695 . _:vb87704 _:vb87703 . _:vb87702 . _:vb87699 "OpenLink Virtuoso RDF crawler" . _:vb87703 . _:vb87705 _:vb87704 . _:vb87695 . _:vb87696 . _:vb87702 . _:vb87696 . _:vb87694 . _:vb87697 . _:vb87697 . _:vb87698 . _:vb87699 . _:vb87704 _:vb87696 . _:vb87699 . _:vb87703 _:vb87702 . _:vb87697 "Fri, 01 Nov 2019 06:03:47 GMT" . _:vb87700 _:vb87701 . _:vb87705 _:vb87694 . _:vb87701 . _:vb87700 . _:vb87694 . _:vb87698 . _:vb87695 . _:vb87704 . _:vb87696 _:vb87697 . _:vb87695 "dx.doi.org" . _:vb87705 .