PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Filed Under: Elections & Voting, Presidency How Martin Luther King, Jr.???s birthday became a holiday January 21, 2013 by NCC Staff The fight to make Dr. Martin Luther King Jr.???s birthday a holiday took 32 years, a lot of campaigning, and guest appearances including Stevie Wonder, Ted Kennedy, and the National Football League.
http://www.w3.org/ns/prov#wasQuotedFrom
  • constitutioncenter.org