About: http://webisa.webdatacommons.org/73336169

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	Properly understood, the chart is a 4-square version of the above with the superset???s area outside of the 4 visible sets removed.
http://www.w3.org/ns/prov#wasQuotedFrom	skepticink.com