PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Sixty years ago, in recognition of this historic voyage, President Franklin D. Roosevelt first called upon the American people to observe May 22 as National Maritime Day by displaying the American flag at their homes and other suitable places.
http://www.w3.org/ns/prov#wasQuotedFrom
  • usmm.org