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.

Example Input: Fact: Exercise can teach animals how to behave. 
Question: What can teach animals how to behave?
Example Output: exercise.

Example Input: Fact: Origami causes an object to change shape. 
Question: What is a method for changing an object's shape?
Example Output: origami.

Example Input: Fact: two substances rubbing together causes an object to lose energy. 
Question: what causes an object to lose energy?
Example Output:
2 substances rubbing together.