About: http://webisa.webdatacommons.org/8133214

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 have not tested, but I think 'cb' will have the same problem as 'xb', i.e. a file opened with 'cb' will also give a fopencookie error.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com