About: http://webisa.webdatacommons.org/281688571

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 components can include a speaker, an amplifier and any other components suitable and/or necessary to establish a receiving apparatus which is acceptable in underwater (or other hostile) environments (see FIG. 3).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com