Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Ex Input:
Question: What are the tiny sacs in the lungs where gas exchange takes place? Answer: alveoli

Ex Output:
Alveoli are tiny sacs in the lungs where gas exchange takes place.

Ex Input:
Question: What are the two main divisions of the human nervous system? Answer: central and peripheral

Ex Output:
The two main divisions of the human nervous system are the central nervous system and the peripheral nervous system. The peripheral nervous system has additional divisions.

Ex Input:
Question: What state of matter has a definite volume, but takes the shape of the container? Answer: liquid

Ex Output:
Liquids have a definite volume, but take the shape of the container.