Q: What is the smallest planet in the solar system?
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A: pluto

Q: What invention in the 17th century revolutionized mathematics by providing the first systematic link between Euclidean geometry and algebra, describing geometric shapes as algebraic equations involving the coordinates of the points lying on it?
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A: cartesian coordinates

Q: In the Harry Potter series of books, what is the name of Hermoine Granger's cat?
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A:
crookshanks