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: Most invertebrates have brains capable of learning. 
Question: Most invertebrates have brains capable of what?
Example Output: learning.

Example Input: Fact: navigation requires knowing which way to go. 
Question: What requires knowing which way to go?
Example Output: navigation.

Example Input: Fact: If something that moves in an elliptical orbit becomes too hot, it cannot sustain life. 
Question: What cannot sustain life if it gets too hot?
Example Output:
Something that moves in an elliptical orbit.