About: http://webisa.webdatacommons.org/42914755

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	A system supporting layers may include extended functionality to mitigate the effect of viruses, worms, user intrusions, and other attempts to modify a protected computer system in undesirable ways.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com