Poetry and Rhymes

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

More Questions from Poetry and Rhymes
What word is next: "There is a place where the sidewalk ends; And before the street"?
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In 'On top of Spaghetti', what causes the loss of the meatball?
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What poem begins "Two roads diverged in a yellow wood, And sorry I could not travel both"?
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What did the old woman in the shoe have too many of?
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Whom can one see at Banbury Cross ?
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In the song "On Top of Spaghetti" what eventually becomes of the meatball?
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From what work did Poe take the line "Whose heart-strings are a lute", used in his poem "Israfel"?
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Whose poem is titled "Let America Be America Again"?
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