<http://webisa.webdatacommons.org/222232777>	<http://www.w3.org/ns/prov#value>	"Iron is a necessary trace element for all known forms of life." .
<http://webisa.webdatacommons.org/222232777>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<newworldencyclopedia.org> .
<http://webisa.webdatacommons.org/prov/6581523>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/222232777> .
<http://webisa.webdatacommons.org/222232777>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .