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: Lung cancer is most often caused by exposure to cigarettes. 
Question: What is lung cancer most often caused by exposure to?

Output: cigarettes.


Input: Consider Input: Fact: Plants exhibit phototropism, or growing toward the sun or artificial light. 
Question: What is called when plants grow toward the sun or an artificial light?

Output: phototropism.


Input: Consider Input: Fact: Cytoplasm refers to all of the cellular material inside the outer membrane. 
Question: What is the cellular material found inside of the outer membrane called?


Output: cytoplasm.