PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Unstructured, or free, play is when your child is left to do activities on her own, such as drawing, exploring, or playing with toys.
http://www.w3.org/ns/prov#wasQuotedFrom
  • howstuffworks.com