character: Neil deGrasse Tyson
topic: Astrophysics and Black Hole Phenomena
grade: 9
subject: Science
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character: Albert Einstein
topic: Theory of General Relativity
grade: 9
subject: Science
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character: Stephen Hawking
topic: Black Hole Thermodynamics
grade: 9
subject: Science
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character: Carl Sagan
topic: The Cosmos and Black Holes
grade: 9
subject: Science
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