About: http://webisa.webdatacommons.org/296130458

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	Your example is not good except if you use the return value to check if the key exists, which is not the right way.
http://www.w3.org/ns/prov#wasQuotedFrom	codeproject.com