About: http://webisa.webdatacommons.org/207979469

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	Human activities such as oil and natural gas production and coal mining, however, may release non-negligible amounts of crustal helium with a low 3He/4He ratio (Oliver et al., 1984).
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com