Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Millibar is the unit used to measure air pressure.

Answer: What is the unit used to measure air pressure?


Question: Temperature and ph level are important in the activity of an enzyme.

Answer: Temperature and what other environmental factor are important in the activity of an enzyme?


Question: Meter much distance can beta particles travel through air.

Answer:
How much distance can beta particles travel through air?