About: http://webisa.webdatacommons.org/155936405

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 seems to allow you to index just about any sort of source, including PDFs and web sites, with ease.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com