About: http://webisa.webdatacommons.org/96578278

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	Over the years, and particularly since the development of the electronic amplifier, there has been substantial effort by many persons and companies to develop small, etficient, inconspicuous hearing aids.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com