About: http://webisa.webdatacommons.org/157774456

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	Data being used in the study were obtained principally from oil companies and from related service companies.
http://www.w3.org/ns/prov#wasQuotedFrom	usgs.gov