In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

Ex Input:
Question: A team has pizza after a game, and they eat most of it, but leave the rest of the pizza out. The pizza is later inedible because of? Answer: lack of food preservation.

Ex Output:
microorganisms cause food to spoil


Ex Input:
Question: A mammal usually nurses its what? Answer: younglings.

Ex Output:
a mammal usually nurses its offspring


Ex Input:
Question: Someone is driving at night. The day was warm, but now the night is cool, and there is a lot of mist that is difficult to see through. The mist is prevalent because? Answer: humidity from the day condensed as night progressed.

Ex Output:

fog is formed by water vapor condensing in the air