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: Line graphs are especially useful for showing changes over time.

Answer: Line graphs are especially useful for showing changes over what?


Question: A fewer predators is most likely to cause the number of rabbits living in an area to increase.

Answer: Which factor is most likely to cause the number of rabbits living in an area to increase?


Question: Acidic hydrogen atoms are those which will be transferred to a base.

Answer:
Acidic hydrogen atoms are those which will be transferred to what?