PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The problem is - and this is the general consensus of biologists who have looked at the problem - that the current extinction rates for well-known groups such as birds and mammals is estimated to be 100 times higher or more than the normal background rate as estimated from the fossil record.
http://www.w3.org/ns/prov#wasQuotedFrom
  • straightdope.com