About: http://webisa.webdatacommons.org/443471138

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	Of course this will block some legitimate mail with someone's spouse sending him an email or something or other so it is not ideal - but it should not affect your CEO.
http://www.w3.org/ns/prov#wasQuotedFrom	serverfault.com