About: http://webisa.webdatacommons.org/124009303

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	Background of the Invention [0002] The cost of electricity from an electric grid fluctuates substantially over a sufficiently long period of time such as a day, a month or a year.
http://www.w3.org/ns/prov#wasQuotedFrom	sumobrain.com