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 a chemical change is acid breaking down substances, another is? Answer: lemon juice added to milk.
[EX A]: An example of a chemical change is acid breaking down substances

[EX Q]: Question: Which is a complete circuit? Answer: a refrigerator that is running.
[EX A]: a complete electrical circuit is a source of electrical energy

[EX Q]: Question: Powdered substances such as oregano and pepper that are used to add flavor to foods come from? Answer: producers.
[EX A]:
plants are the source of spices

