Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.

Ex Input:
Fact: Machines can cause objects to change shape. 
Question: What can cause objects to change shape?

Ex Output:
Machines.


Ex Input:
Fact: Something studied by Michael Faraday can cause objects to repel each other. 
Question: What can cause objects to repel each other?

Ex Output:
Something studied by Michael Faraday.


Ex Input:
Fact: Carpooling decreases the amount of smog in the air. 
Question: How can smog be reduced?

Ex Output:

Carpooling.