About: http://webisa.webdatacommons.org/375217937

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	Of course they aren???t perfect???there are no such products???but they don???t cost much especially given the technologies that have been applied and the sound they produce.
http://www.w3.org/ns/prov#wasQuotedFrom	6moons.com