About: http://webisa.webdatacommons.org/201469819

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	Using Greasemonkey, we can guess with pretty good accuracy that a message was supposed to contain an attachment if it contains words such as attachment or files.
http://www.w3.org/ns/prov#wasQuotedFrom	oreilly.com