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?"

Input: Consider Input: Fact: the maglev train is used for moving people.

Output: the maglev train is used for moving what?


Input: Consider Input: Fact: thirst is used to make chickens realize they need to replenish its bodily water.

Output: what uses thirst to realize it needs to replenish its bodily water?


Input: Consider Input: Fact: mammal hearts have two more sections than fish hearts.


Output: How many sections does a fish heart have?