About: http://webisa.webdatacommons.org/299208235

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	Yves' answer is perfect if you are never going to re-evaluate your plot, for example because the data have been updated.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com