About: http://webisa.webdatacommons.org/182009174

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	However, there is a limit to this scenario as well, since natural gas cannot always be substituted for oil.
http://www.w3.org/ns/prov#wasQuotedFrom	heritage.org