About: http://webisa.webdatacommons.org/312005355

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	Larger transducers are more difficult to position so that the entire aperture is clear of intervening media such as bone or gas pockets that may degrade or destroy the ability to focus properly.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com