<http://webisa.webdatacommons.org/prov/6581523>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/418255177> .
<http://webisa.webdatacommons.org/418255177>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/418255177>	<http://www.w3.org/ns/prov#value>	"Iron is a trace element and essential nutrient." .
<http://webisa.webdatacommons.org/prov/454406087>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/418255177> .
<http://webisa.webdatacommons.org/418255177>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<biomedcentral.com> .