About: http://webisa.webdatacommons.org/127306386

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	at O'Reilly, had to say.Direct book sales through O'Reilly's website make up 10% of its business, and most of those sales are digital books.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com