About: http://webisa.webdatacommons.org/153805058

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 was reading a Ziff-Davis article about e-textbooks (http://education.zdnet.com/?p=3657&tag=nl.e539) and near the end is a comment Even Calibre can???t handle VitalSource books.
http://www.w3.org/ns/prov#wasQuotedFrom	mobileread.com