About: http://webisa.webdatacommons.org/59479971

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	Impurities such as carbon dioxide, sulfides or sometimes nitrogen must be removed to make the gas marketable.
http://www.w3.org/ns/prov#wasQuotedFrom	fool.com