PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Nickel, mainly used to make stainless steel, has gained 32% since the start of 2010 and, at around $25,000 a tonne, is close to a two-year high.
http://www.w3.org/ns/prov#wasQuotedFrom
  • economist.com