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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	When modifications to objects involved using new materials, such as shifting from wood to iron in shipbuilding, those in carpentry had to learn new skills in metalworking. ??? Related books and articles
http://www.w3.org/ns/prov#wasQuotedFrom	questia.com