About: http://webisa.webdatacommons.org/190689085

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	Looks to me that there???s a good decade or so, especially the later you go in the series, as the quality of the data improves.
http://www.w3.org/ns/prov#wasQuotedFrom	wattsupwiththat.com