Given a statement, generate a question such that the answer is contained in that statement.
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Question: cows can be plant eaters

Answer: What type of animal can cows be?


Question: Acids that taste vinegary will change a litmus paper red.

Answer: What color of paper will acid that taste vinegary change?


Question: hydration of cells is essential for all animalson Earth

Answer:
What is essential for all animalson Earth?