About: http://webisa.webdatacommons.org/429803423

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	contentType--This is for the MIME type of the message, and optionally a character set as well, such as in the following examples:
http://www.w3.org/ns/prov#wasQuotedFrom	oracle.com