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

Example Input: Catalyst gets poisoned happens if a molecule forms strong bonds to the catalyst.
Example Output: What happens if a molecule forms strong bonds to the catalyst?

Example Input: A wall of rocks or concrete a called a groin.
Example Output: What is a wall of rocks or concrete called?

Example Input: There are six types of leptons.
Example Output:
How many types of leptons are there?