About: http://webisa.webdatacommons.org/101505991

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	For any x in A, take the countable collection of open balls {B(x, 1/n) : n is a positive integer}.
http://www.w3.org/ns/prov#wasQuotedFrom	physicsforums.com