character: Carl Sagan
topic: The Role of Black Holes in Galactic Evolution
grade: 12
subject: Physics
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character: Stephen Hawking
topic: Black Holes and Cosmology
grade: 12
subject: Physics
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character: Albert Einstein
topic: General Relativity and Its Impact on Understanding Black Holes
grade: 12
subject: Physics
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character: Neil deGrasse Tyson
topic: The Influence of Black Holes on the Structure of Galaxies
grade: 12
subject: Physics
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