About: http://webisa.webdatacommons.org/401449051

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 ultrasonic wave lens 22 is a dielectric material, such as polystyrene, which is substantially transparent to both microwave energy and ultrasonic wave energy in the frequency ranges noted above.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com