PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • More than 20 percent of the building materials (by cost) is composed of recycled materials such as structural steel and rebar, metal framing and panels, gypsum wallboard, carpet and medium density fiberboard (MDF) wood.
http://www.w3.org/ns/prov#wasQuotedFrom
  • buildings.com