About: http://webisa.webdatacommons.org/52678750

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 article is a keystone of arithmetic, these days, across the world.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org