Given a statement, generate a question such that the answer is contained in that statement.

Q: Going under trees can be used by animals to avoid predators

A: Who can use going under trees to avoid predators?
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Q: Pigeon eggs have hard shells made of calcium carbonate.

A: What is the hard shell of pigeon eggs made of?
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Q: eagles move their wings using large back muscles

A:
Who moves their wings using large back muscles?
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