character: Albert Einstein
topic: Einstein-Szilard letter
grade: 11
subject: Physics
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character: Leo Szilard
topic: Einstein-Szilard letter
grade: 11
subject: Physics
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character: Franklin D. Roosevelt
topic: Response to the Einstein-Szilard letter
grade: 11
subject: Physics
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character: J. Robert Oppenheimer
topic: Impact of the Einstein-Szilard letter on the Manhattan Project
grade: 11
subject: Physics
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