About: http://webisa.webdatacommons.org/98875253

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 sublayers having a relatively low acoustic impedance may be composed of an elemental metal selected from (a) Al and Ag; or an alloy principally containing at least one metal selected from (b) Al and Ag.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com