character: Stephen Hawking
topic: Black Holes and the Universe
grade: 12
subject: Physics
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character: Albert Einstein
topic: Theory of Relativity
grade: 12
subject: Physics
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character: Carl Sagan
topic: Cosmos and Astrobiology
grade: 12
subject: Physics
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character: Neil deGrasse Tyson
topic: Astrophysics and Cosmology
grade: 12
subject: Physics
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