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

[Q]: Nonvascular plants are the only plants with a life cycle in which the gametophyte generation is dominant.
[A]: What are the only plants with a life cycle in which the gametophyte generation is dominant?


[Q]: Glaciers deposit their sediment when they melt.
[A]: When do glaciers deposit their sediment?


[Q]: A river of these is a natural resource of virginia.
[A]:
Which of these is a natural resource of Virginia?