Poetry and Rhymes

In "O Captain! My Captain!", what does the ship symbolize?

More Questions from Poetry and Rhymes
What did Humpty Dumpty sit on?
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Who sat in the corner, eating a Christmas pie, putting in his thumb and pulling a plum ?
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When you do the 'Hokey Pokey', what do you turn around?
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What Norwegian fairy tale character "Ate a Match with the Troll"?
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In the nursery rhyme "Little Boy Blue", where are the cows?
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Whose poem is titled "The School Boy"?
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Whose poem is titled "I Carry Your Heart With Me"?
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In 'The Itsy Bitsy Spider' what came down and washed away the spider?
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