About: http://webisa.webdatacommons.org/42260374

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	But this coal is a very poor quality, lignite to sub-bituminous, present at lower territory sequence, and is around 50-60 million years old.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com