About: http://webisa.webdatacommons.org/283856603

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	The coal is mainly composed of carbon; however, the coals used in power plants are not completely purified.
http://www.w3.org/ns/prov#wasQuotedFrom	uiuc.edu