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: Female mammals have breasts. 
Question: What has breasts?

Ex Output:
Female mammals.


Ex Input:
Fact: When a population suddenly gets much smaller the effects are unpredictable. 
Question: What is the effect of a population suddenly getting much smaller?

Ex Output:
it is unpredicatbale.


Ex Input:
Fact: an electron microscope is used for seeing bacteria by making them appear bigger. 
Question: What can be used to see bacteria by making them appear bigger?

Ex Output:

microscope.