About: http://webisa.webdatacommons.org/323687318

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	Minerals on Earth have been transformed by billions of years of action by water, life, atmosphere and other processes that tends to binds some of them (rare earths in particular) in forms that are more difficult to refine.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org