<http://webisa.webdatacommons.org/prov/48418172>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/191620523> .
<http://webisa.webdatacommons.org/191620523>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/191620523>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<biomedcentral.com> .
<http://webisa.webdatacommons.org/191620523>	<http://www.w3.org/ns/prov#value>	"resources such as the National Library of Medicine's PubMed system [1]." .