About: http://webisa.webdatacommons.org/10264821

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	Even though copper blister is 99% pure copper, it still contains high enough levels of sulfur, oxygen, and other impurities to hamper further refining.
http://www.w3.org/ns/prov#wasQuotedFrom	keywen.com