About: http://webisa.webdatacommons.org/440633610

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 piezoelectric element has a top layer made of piezo crystal and a bottom layer made of a conductive metal such as brass.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com