character: Stephen Hawking
topic: Black Holes and General Relativity
grade: 8
subject: English Language
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character: Albert Einstein
topic: General Relativity
grade: 8
subject: English Language
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character: Isaac Newton
topic: Gravitation
grade: 8
subject: English Language
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character: Carl Sagan
topic: Cosmos and Black Holes
grade: 8
subject: English Language
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