About: http://webisa.webdatacommons.org/4564859

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	By methane-containing gas we mean the mixture of principally methane and carbon dioxide as produced by anaerobic digestion systems.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com