About: http://webisa.webdatacommons.org/115932064

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	Other ores require a pre-leach or an acid pre-leach to remove excess poisons and various metals such as lead or copper.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com