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

[Q]: Pressure and vibration are examples of physical type of stimuli.
[A]: Pressure and vibration are examples of what type of stimuli?


[Q]: Springs or geysers do we call heated groundwater that erupts from the ground under pressure.
[A]: What do we call heated groundwater that erupts from the ground under pressure?


[Q]: The parent element are cations simply named after.
[A]:
What are cations simply named after?