About: http://webisa.webdatacommons.org/36504698

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 consists chiefly of methane (CH4, natural gas or marsh gas) but always contains small quantities of other gases, such as nitrogen, carbon dioxide, and hydrogen, and sometimes ethane and carbon monoxide.
http://www.w3.org/ns/prov#wasQuotedFrom	herald.com