http://dbpedia.org/resource/Willoughby_Township%2C_Ontario +
, http://dbpedia.org/resource/John_J._Smith +
, http://dbpedia.org/resource/Philip_A._Hart_Plaza +
, http://dbpedia.org/resource/History_of_slavery_in_Maryland +
, http://dbpedia.org/resource/Black_Canadians_in_Ontario +
, http://dbpedia.org/resource/Cozad%E2%80%93Bates_House +
, http://dbpedia.org/resource/John_R._Park_Homestead_Conservation_Area +
, http://dbpedia.org/resource/Underground_Railroad +
, http://dbpedia.org/resource/Tilly_Escape +
, http://dbpedia.org/resource/Dover_Eight +
, http://dbpedia.org/resource/Camp_Greene_%28Washington%2C_D.C.%29 +
, http://dbpedia.org/resource/Samuel_Burris +
, http://dbpedia.org/resource/Hamilton_and_Rhoda_Littlefield_House +
, http://dbpedia.org/resource/Schenectady%2C_New_York +
, http://dbpedia.org/resource/William_Brinkley_%28Underground_Railroad%29 +
, http://dbpedia.org/resource/Sherwood_Equal_Rights_Historic_District +
, http://dbpedia.org/resource/William_C._Goodridge +
, http://dbpedia.org/resource/British_Methodist_Episcopal_Church%2C_Salem_Chapel +
, http://dbpedia.org/resource/Hiram_Wilson +
, http://dbpedia.org/resource/Valerie_Still +
, http://dbpedia.org/resource/Calvin_Ellis_Stowe +
, http://dbpedia.org/resource/Sheldon_Peck +
, http://dbpedia.org/resource/Hoodoo_%28spirituality%29 +
, http://dbpedia.org/resource/Harriet_Tubman +
, http://dbpedia.org/resource/B&O_Railroad_Museum +
, http://dbpedia.org/resource/Murals_of_York%2C_Pennsylvania +
, http://dbpedia.org/resource/List_of_Underground_Railroad_sites +
, http://dbpedia.org/resource/Manatee_Mineral_Springs_Park +
, http://dbpedia.org/resource/History_of_African_Americans_in_Jacksonville +
, http://dbpedia.org/resource/Freedom_Crossing_Monument +
, http://dbpedia.org/resource/Joe_Thompson_vs_Walter_Clarke +
, http://dbpedia.org/resource/Thornton_Blackburn +
, http://dbpedia.org/resource/Isaac_S._Flint +
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