PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Perfectly reasonable, but there is a problem: Slavery had been legal within the Northern states that existed at the adoption of the Constitution, but, by virtue of Jefferson's Northwest Ordinance, slavery was never legal in Ohio, Indiana, Illinois, Michigan, Wisconsin, or Minnesota. (Caveat: There apparently was an effort to introduce slavery into Illinois after statehood; it failed.) In addition,
http://www.w3.org/ns/prov#wasQuotedFrom
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