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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	ce.U.S. Pat. No. 6,551,159 to Spinelli covers the shortcomings of many examples of the prior art very well.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com