TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: The water in some springs are hot because they're heated by hot magma.

SOLUTION: The water in some springs are hot because they're heated by what?

PROBLEM: In a carbon triple bond, three pairs of electrons are shared.

SOLUTION: In a carbon triple bond, how many pairs of electrons are shared?

PROBLEM: Three many types of mechanical waves are there.

SOLUTION:
How many types of mechanical waves are there?