About: http://webisa.webdatacommons.org/137042423

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	In taxicab metric the circle is a diamond, but the length of each of the edges of the diamond is 2 according to the taxicab metric itself, so the entire perimeter is 8, which is 4 times the diameter.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com