About: http://webisa.webdatacommons.org/30581337

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	Coal is a rock that results primarily from the sedimentation of plant matter but includes many inorganic elements as well e.g. uranium, thorium and other radioactive isotopes albeit in low quantities.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com