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Intermediate World

Which civilization built Machu Picchu in the fifteenth century?

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Hard World

What is the oldest known mechanical analog computer?

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Intermediate House M.D.

What medical specialties does Gregory House lead in House M.D.?

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Hard House M.D.

What literary detective is Gregory House primarily modeled on in House M.D.?

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Easy House M.D.

Who portrayed Dr. James Wilson, Gregory House's closest friend, in House M.D.?

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