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.

Input: Consider Input: Fact: Flowers detect light and darkness. 
Question: What grows after detecting light?

Output: Flowers.


Input: Consider Input: Fact: Bioterrorism is the spread of pathogens. 
Question: What does bioterrorism spread?

Output: Pathogens.


Input: Consider Input: Fact: By using an electron beam as a source of illumination, very small objects appear bigger. 
Question: To make very small objects appear bigger, one can use what instead of light for illumination?


Output: electron beam.