PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In some cases, euphoria, increased energy, or depression can precede a headache, with abnormal cravings for certain types of food that may last up to 24 hours.Migraine headaches may be incapacitating, requiring a person to take time off from work or other important activities.
http://www.w3.org/ns/prov#wasQuotedFrom
  • dana.org