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

Q: Water leaves ponds and lakes through evaporation and also as outflow.

A: Water leaves ponds and lakes through evaporation and also as what?
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Q: The values of strangeness assigned to various particles are based on decay systematics.

A: The values of strangeness assigned to various particles are based on what?
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Q: Mercury is always closer to the sun than it is to earth.

A:
Which of the following planets is always closer to the Sun than it is to Earth?
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