About: http://webisa.webdatacommons.org/91177220

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	In the traditional commodity exchange system, a contract traded is a commitment to buy or sell a specific amount of a commodity to be delivered in the future at a specific date in time.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com