PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Although the amplifier system can initially be set to meet these performance specifications, it is widely believed, as a result of component aging, environmental conditions, and other factors which introduce drift, such systems are dynamic and will inevitably fail to sustain required performance levels.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com