About: http://webisa.webdatacommons.org/455014333

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	It can be exceptionally useful both in Gmail and in your other e-mail systems, and I use it extensively for things such as mailing lists and weblog commenting.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com