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 Q]: Question: An example of combining two substances is? Answer: pouring queso into guacamole.
[EX A]: An example of combining two substances is pouring one substance into the other substance

[EX Q]: Question: Jerry put some salt into some tap water and stirred it up. What has Jerry made? Answer: a solution.
[EX A]: a solution is made of one substance dissolved in another substance

[EX Q]: Question: People are switching to electric cars because cars that use gas? Answer: dirty the air.
[EX A]:
electricity causes less pollution than gasoline