About: http://webisa.webdatacommons.org/291770280

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	Controllers such as programmable logic controllers (PLC) have been implemented in duplex or back-up system configurations where downtime of a system cannot be tolerated.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es