About: http://webisa.webdatacommons.org/56750144

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Iron is essential to all vertebrate forms of life, because it is a vital constituent of the heme portion of hemoglobin.
http://www.w3.org/ns/prov#wasQuotedFrom	siumed.edu