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: Genes are molecules that contain a single protein. 
Question: what are molecules that contain a single protein?

Ex Output:
genes.


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

Ex Output:
navigation.


Ex Input:
Fact: Logging has a negative impact on an ecosystem. 
Question: What has a negative impact on an ecosystem?

Ex Output:

Logging.