Blowin in the Wind (with audio)

Audio here: https://www.youtube.com/watch?v=26507qz6ayo
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How many roads must a man walk down 
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Before you call him a man,
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Yes and how many seas must a white dove sail
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Before she sleeps in the sand,
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Yes and how many times must the cannonballs fly, 
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Before they are forever banned,
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The answer my friend is blowin in the wind,
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The answer is blowin in the wind