About: http://webisa.webdatacommons.org/313002647

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	The service sounds promising, if somewhat limited in this first iteration: for starters, attachments can be filtered by sender and file type ??? but not subject or other keywords.
http://www.w3.org/ns/prov#wasQuotedFrom	techcrunch.com