Turn the given fact into a question by a simple rearrangement of words. This typically involves replacing some part of the given fact with a WH word. For example, replacing the subject of the provided fact with the word "what" can form a valid question. Don't be creative! You just need to rearrange the words to turn the fact into a question - easy! Don't just randomly remove a word from the given fact to form a question. Remember that your question must evaluate scientific understanding. Pick a word or a phrase in the given fact to be the correct answer, then make the rest of the question. You can also form a question without any WH words. For example, "A radio converts electricity into?"

Ex Input:
Fact: Fossil fuels are formed from dead organisms over eons.

Ex Output:
How long does it take for fossil fuels to be formed from dead organisms?


Ex Input:
Fact: a flashlight requires a source of energy to produce light.

Ex Output:
What requires a source of energy to produce light?


Ex Input:
Fact: blood flow is regulated by breathing.

Ex Output:

what is regulated by breathing?