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

Example Input: A volcano chain is formed by subduction of oceanic crust beneath a continental or oceanic plate.
Example Output: What kind of chain is formed by subduction of oceanic crust beneath a continental or oceanic plate?

Example Input: The long bone work as lever.
Example Output: What type of function does the long bone perform?

Example Input: Venom do puffer fish produce to protect itself.
Example Output:
What do puffer fish produce to protect itself?