PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The problem occurs mostly over snow and ice covered Arctic and Antarctic regions (e.g. Greenland) in conditions of polar night and twilight.
http://www.w3.org/ns/prov#wasQuotedFrom
  • nasa.gov