PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Unplanned downtime is primarily caused by hardware failure (computer failure and storage failure), disk corruption, power outages, communication failures, natural disasters, terrorism, human error, and other factors that cause the primary production database, the production server, and/or the production data center to be unavailable.
http://www.w3.org/ns/prov#wasQuotedFrom
  • microsoft.com