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.

Input: Consider Input: Fact: Eggs are fertilized during reproduction. 
Question: What happens during reproduction?

Output: eggs are fertilized.


Input: Consider Input: Fact: Exercise can teach animals how to behave. 
Question: What can teach animals how to behave?

Output: exercise.


Input: Consider Input: Fact: Cellulose material can be used to keep a home warm. 
Question: What can keep a home warm?


Output: cellulose material.