About: http://webisa.webdatacommons.org/2193056

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 elements, such as hydrogen and helium, are very common, whereas others, such as silver and gold, are very rare.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com