About: http://webisa.webdatacommons.org/70778280

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	I do think that would work for textbooks, especially if Amazon is planning to upgrade the Kindle to use color.
http://www.w3.org/ns/prov#wasQuotedFrom	washingtonpost.com