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

Q: Carbon 14 isotope of carbon is typically used to date ancient items.

A: What isotope of carbon is typically used to date ancient items?
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Q: A bow wake is created when the wave source moves faster than the wave propagation speed.

A: What is created when the wave source moves faster than the wave propagation speed?
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Q: The vast majority of earthquake occurs along one of three types of plate boundaries.

A:
The vast majority of what phenomena occurs along one of three types of plate boundaries?
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