About: http://webisa.webdatacommons.org/17638268

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	So you can easily index all kinds of file formats (email, .txt, .html, .xml, .pdf, .doc, .xls, etc) without writing your own parser.
http://www.w3.org/ns/prov#wasQuotedFrom	cpan.org