About: http://webisa.webdatacommons.org/42992561

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	Usually you would use extension methods if you are only adding functionality to a well known, well used class or interface such as the .Net base classes, that you do not have access to the code for.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com