About: http://webisa.webdatacommons.org/108711964

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	Some are essential for life, such as copper, iron, magnesium, manganese, nickel and zinc; others are toxic, such as arsenic, cadmium, lead and mercury.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com