instruction:
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.
question:
Fact: Humans have collected and grown fungi for food for thousands of years. 
Question: What have humans collected and grown as food for thousands of years?
answer:
fungi.


question:
Fact: Scraping oneself on surfaces or things that have germs may cause infection. 
Question: Which of the following may cause infection?
answer:
Germy surfaces.


question:
Fact: at least one in every five people in the world is in a time of significant mental, emotional and social changes. 
Question: how many people in the world is in a time of significant mental changes?
answer:

at least one in every five.