About: http://webisa.webdatacommons.org/397328502

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 central system 200 (FIG. 1-B) is managed by an operator using the operator controls 240 which are likely a computer input terminal including a keyboard and a control display 280 such as a conventional computer screen.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com