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

Q: The sporophyte stage is the dominant stage of the lifecycle of a fern.

A: Which is the dominant stage of the lifecycle of a fern?
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Q: Cancer occurs most often in adults over fifty age.

A: Cancer occurs most often in adults over what age?
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Q: Two plates sliding can increase the occurance of earthquakes.

A:
What can increase the occurance of earthquakes?
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