PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • By 1920, the third generation after freedom, most African Americans in Mississippi were landless laborers again facing poverty.[1] Starting about 1913, tens of thousands of black Americans left Mississippi for the North in the Great Migration to industrial cities such as St. Louis, Chicago, Detroit, Cleveland, Philadelphia and New York.
http://www.w3.org/ns/prov#wasQuotedFrom
  • werelate.org