PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The cathode electrode can also be made from other metals such as tungsten (W), niobium (Nb), tantalum (Ta), titanium (Ti), molybdenum (Mo), chromium (Cr), gold (Au), silver (Ag) and the like; alloys and compounds containing these metal elements.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freepatentsonline.com