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      "utf8": "You're in line at the grocery store when, uh oh,"
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    "segs": [ {
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      "utf8": "This process starts in the nucleus."
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    "segs": [ {
      "utf8": "That's the roll of the mitochondria."
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      "utf8": "Plant cells make energy a different way."
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      "utf8": "All the parts of a cell have to work together"
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      "utf8": "and all the cells of your body have to work together"
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    "segs": [ {
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