About: http://webisa.webdatacommons.org/133605102

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	Rocks are a mixture of minerals and from these minerals extremely useful metals can be extracted.
http://www.w3.org/ns/prov#wasQuotedFrom	docbrown.info