About: http://webisa.webdatacommons.org/320716916

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	Sands, gravel, placer ores, phosphate ores, friable coals, and uranium ore are examples of materials which can be mined using the present invention.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com