About: http://webisa.webdatacommons.org/199832803

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	For example, consider the problem presented by a mineral ore coated with silica and iron oxide, and from which one wishes to extract the underlying metal such as gold, silver and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com