About: http://webisa.webdatacommons.org/177057247

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	In fact, I would probably lean the other way, that using one would make things harder.The rest of your post is quite spot on.
http://www.w3.org/ns/prov#wasQuotedFrom	slashdot.org