About: http://webisa.webdatacommons.org/407206259

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	The circumscribed sphere of a triangle is empty if it does not contain vertices other than the three vertices that define the triangle.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com