(Francisco Kjolseth | Tribune file photo) Rep. Sandra Hollins, D-Salt Lake, says a few words in conjunction with the 400th anniversary of the arrival of African slaves in the United States, as Salt Lake City dedicates the first grave marker for Tom, an enslaved black pioneer who was buried in the Salt Lake City Cemetery in 1862. The placement and dedication of the marker on Thursday, Aug. 22, 2019, is the result of research initially conducted by Mark Smith, the former sexton of the Cemetery.