About: http://webisa.webdatacommons.org/419120813

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 typically at least 90 per cent methane, plus other hydrocarbons such as ethane and propane.
http://www.w3.org/ns/prov#wasQuotedFrom	bgs.ac.uk