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

[Q]: At a convergent plate boundary, when one plate is oceanic, there are large volcanoes.
[A]: At a convergent plate boundary, when one plate is oceanic, there are large what?


[Q]: A frog develops (a/an) lungs as it changes from a tadpole to an adult frog.
[A]: Which of the following structures does a frog develop as it changes from a tadpole to an adult frog?


[Q]: A moving car is said to be in dynamic equilibrium when it is zero net force.
[A]:
When is a moving car said to be in dynamic equilibrium?