About: http://webisa.webdatacommons.org/29286383

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 have any specific stats to link to, except the article you have already mentioned (which I read yesterday and found really interesting).
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com