PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Also, railroads were essential for moving coal and iron ore and without them a place like Birmingham, AL could not have become a steel center after the Civil War.According to Fogel, railroads did not use as much iron as had been generally assumed, consuming only about 25% of production, while nails, hardware, shovels and other tools used more iron.
http://www.w3.org/ns/prov#wasQuotedFrom
  • amazon.com