About: http://webisa.webdatacommons.org/179024239

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	The powder is then acid leached to remove contaminants, including magnesium and magnesium oxide, before the material is used to produce capacitors.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com