About: http://webisa.webdatacommons.org/146109327

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	If the item is determined not to be a hyperlink (step 908), then the e-mail processor determines if the item is an attachment, such as a Portable Document Format (PDF) document (step 912).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com