About: http://webisa.webdatacommons.org/24322939

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	Such devices are extremely simple and cheap, do not require electricity, can be manufactured, for example, entirely out of a single material such as plastic, with a method such as injection molding, and are simple to operate.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com