About: http://webisa.webdatacommons.org/163371740

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 the following table, s is an instance of set, pos is an iterator into s,
http://www.w3.org/ns/prov#wasQuotedFrom	boost.org