PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Collagen can be obtained from calfskin, steer hide, cowhide, pigskin or other starting material.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.ca