About: http://webisa.webdatacommons.org/29882171

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	Many of these control systems can be patched only once a year during an annual maintenance break; others run operating systems so old, such as Windows NT, that there are no more patches for them.
http://www.w3.org/ns/prov#wasQuotedFrom	mcafee.com