About: http://webisa.webdatacommons.org/224480112

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	When methane gas forms underground, other gases such as butane and propane form too.
http://www.w3.org/ns/prov#wasQuotedFrom	uniongas.com