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: chloroplasts are found in plant cells. 
Question: Where are chloroplasts found?
answer:
plants.


question:
Fact: food is irradiated for space travel. 
Question: what food is required for space travel?
answer:
irradiated.


question:
Fact: Bacillus anthracis spores are another potential threat in the environment. 
Question: What are another potential threat in the environment?
answer:

Bacillus anthracis spores.