About: http://webisa.webdatacommons.org/120943888

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 generally consists of 95% methane, 3% ethane, propane, and butane, and 2% non-hydrocarbon gases such as carbon dioxide, nitrogen, or helium (EPA 2010).
http://www.w3.org/ns/prov#wasQuotedFrom	wilkes.edu