About: http://webisa.webdatacommons.org/446500719

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	Systems are operated by controls, such as buttons, mice, switches, levers, dials, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org