About: http://webisa.webdatacommons.org/319004403

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	As David and Steve point out, how close given nodes are, what nodes form sub communities, and which users are the most connected are all examples of useful data that can be pulled from this schema.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com