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

[EX Q]: When magma heats groundwater, it may come to the surface as a hot spring or a geyser.
[EX A]: When magma heats groundwater, it may come to the surface as a hot spring or a what?

[EX Q]: In machines that increase force, such as ramps and doorknobs and nutcrackers, output is greater is the relation between output and input force.
[EX A]: In machines that increase force, such as ramps and doorknobs and nutcrackers, what is the relation between output and input force?

[EX Q]: Intervertebral discs are made of fibrocartilage.
[EX A]:
What are intervertebral discs made of?