About: http://webisa.webdatacommons.org/273271096

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	The front 17 and back covers 18 are preferably formed from a semi-rigid sheet stock fabricated from a material such as plastic, cardboard or fiberboard.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com