About: http://webisa.webdatacommons.org/55315970

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	The technology also can use sound to discriminate between passive tools (i.e., no batteries) made from such materials as wood, acrylic and polystyrene foam.
http://www.w3.org/ns/prov#wasQuotedFrom	cmu.edu