About: http://webisa.webdatacommons.org/405090426

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	Historically, electronic devices, such as consumer electronics equipment, were powered ???on??? or powered ???off??? by mechanical or electromechanical switches.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com