Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: Water is at the neutrality, 7 point on the ph scale.

A: At what point is water on the ph scale?
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Q: The sun is considered the center of the solar system.

A: What is considered the center of the solar system?
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Q: 22 million many people die from air pollution each year.

A:
How many people die from air pollution each year?
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