character: Isaac Newton
topic: Gravitational Laws
grade: 4
subject: Foreign Language
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character: Galileo Galilei
topic: Motion and Gravity
grade: 4
subject: Foreign Language
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character: Albert Einstein
topic: Theory of Relativity
grade: 4
subject: Foreign Language
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character: Stephen Hawking
topic: Black Holes and Gravity
grade: 4
subject: Foreign Language
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