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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	This textbook is an introduction to ... in various branches of science, including mathematics ...
http://www.w3.org/ns/prov#wasQuotedFrom	webtopicture.com