PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • National Sleep Foundation The Foundation???s website provides information on sleep, including sleep disorders, and additional resources, including books, directories, and online support groups.
http://www.w3.org/ns/prov#wasQuotedFrom
  • nih.gov