Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
--------
Question: At a convergent plate boundary, when one plate is oceanic, there are large volcanoes.

Answer: At a convergent plate boundary, when one plate is oceanic, there are large what?


Question: Rubber is an example of a(n) insulators that does not allow electrons to move through them.

Answer: Rubber is an example of what type of substances that do not allow electrons to move through them?


Question: Most of the energy used by living things comes either directly or indirectly from the sun.

Answer:
Most of the energy used by living things comes either directly or indirectly from what?