About: http://webisa.webdatacommons.org/82989205

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	During the extraction processing of aluminium from alumina trace elements like Fe, Na, Li, Ca, Ti, V, Cr, and compounds such as oxides, nitrides, borides, carbides, and H can go into the structure.
http://www.w3.org/ns/prov#wasQuotedFrom	hindawi.com