About: http://webisa.webdatacommons.org/72283135

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	http://www.freepatentsonline.com/7579399.htmlThroughout human history shaping tools have taken a variety of forms including stone, metals, alloys, and diamond.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com