PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Osteopontin is a cytokine that is frequently secreted by cancer cells and plays important roles in their ability to metastasize.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com