About: http://webisa.webdatacommons.org/125864495

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	A set can contain one or more sets, for example the set of all the different sets that can contain zero or more of the integers 1 and 2 (try it, there are only four possible sets)
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com