About: http://webisa.webdatacommons.org/377872298

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	Specifically, the coal must often be separated both from refuse, i.e. pyrites, slate, clay, etc., and from water, and other liquids, used to separate such refuse.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au