About: http://webisa.webdatacommons.org/121071416

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	It is known that heavy metals, such as lead, cadmium, mercury and radioactive compounds, are associated with oil and gas activities in some circumstances.
http://www.w3.org/ns/prov#wasQuotedFrom	noaa.gov