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

Ex Output:
exercise.


Ex Input:
Fact: cats may compete for territory, water, food, or mates. 
Question: what may compete for territory, water, food, or mates?

Ex Output:
cats.


Ex Input:
Fact: stomates must be open for water vapor to move from plants into the atmosphere. 
Question: what must happen for water vapor to move from plants into the atmosphere?

Ex Output:

stomates must be open.