About: http://webisa.webdatacommons.org/336458174

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	PPP's are defined in the wikipedia (of course) and using my friend google, I found the NCPPP the website for which is described as News articles, papers and other resources from this American body promoting P3s.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com