About: http://webisa.webdatacommons.org/224756177

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	This point is a vertex of the desired polyhedron, and the lines of intersection of the planes of neighboring circles, taken two at a time, are edges of the polyhedron.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com