About: http://webisa.webdatacommons.org/218714894

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	The system of claim 2196, wherein at least one of the heat sources is a gas burner, and the system comprises a conduit carrying fuel gas for the gas burner, wherein the conduit is in at least one tunnel.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es