Note the associations that different ethnicities have with different forms of transportation. 
    I'm half Irish, and in the collective memory of the Irish-Americans, travel by ship is mainly positive.  For all its difficulty, it was a journey by ship that liberated my Irish ancestors from famine and oppression in their homeland, and brought them to America.
    Ships are a dark presence in the collective memory of most African-Americans, because ships were what made possible the oceanic slav...
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