About: http://webisa.webdatacommons.org/427514858

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	It also ignores that much coal is left in the ground in some kinds of mining, such as pillar and room, and could be recovered by other techniques.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com