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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	Page 33 : ... economists, psychologists, and other social scientists use some of ...See a random page in this book.
http://www.w3.org/ns/prov#wasQuotedFrom	amazon.ca