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

Answer: navigation.


Question: Fact: Bulbs require electrical energy to see in darkness. 
Question: Bulbs produce electrical energy to what?

Answer: see in darkness.


Question: Fact: A generator converts kinetic energy into something that is converted into light energy by headlights. 
Question: A generator converts kinetic energy into something, which can then be converted to light by what?

Answer:
headlights.