About: http://webisa.webdatacommons.org/414819745

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 agree being in his E-Mail contacts is the most logical answer but it does not look like it is the case.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com