free slave 2.90   He freed the slaves.
  own slave 2.83   They never owned slaves.
  keep slave 0.99   Nobody alive today kept slaves.
  portray slave 0.59   Neither woman apologizes for portraying slaves.
  buy slave 0.53   She ended up in a camp where slaves were bought and sold.
  sell slave 0.53   Agitating by abolitionists led many owners to sell their slaves to speculators.
  bring slave 0.39   Portugal colonized Brazil, then brought slaves from Africa.
  have slave 0.39   The slaves yes they had slaves to row.
  hold slave 0.39   In addition, there was evidence that the Shang empire engaged in human sacrifice and may have held slaves.
  include slave 0.39   They could own property, including slaves, and owned about a third of the land.
  take slave 0.39   Take runaway slaves.
  carry slave 0.33   Vikings carried away slaves from raids in Northern Europe.
  capture slave 0.26   Each new captive could win his freedom only by capturing another slave from the Portuguese.
  import slave 0.26   They also imported slaves.
  insure slave 0.26   Aetna profited from insuring slaves.
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