About: http://webisa.webdatacommons.org/159151120

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	What I would suggest is that you begin with a subclass or decorator class such as the one above, then add support explicitly for -(NSArray*)allKeys, which is a standard accessor in NSDictionary itself.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com