About: http://webisa.webdatacommons.org/219539718

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	I do not see that throwing an exception is a bad thing, as I would rather .NET informed me that it was a read only file.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com