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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	Google Books There are three types of books:In-copyright and in-print booksIn-copyright and out-of-print booksOut-of-copyright booksGoogle Confidential and Proprietary
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net