PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Thus, there is a need for novel methods and systems to make hydrogen widely available without incurring the high costs of developing a hydrogen gas distribution infrastructure.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com