instruction:
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.
question:
Question: Birds give birth to their babies while still in an egg. Mammals, however, give birth to their babies? Answer: already alive.
answer:
mammals give birth to live young


question:
Question: Perspiration leaving the torso through evaporation helps? Answer: cool it down.
answer:
sweat cools a body


question:
Question: Which is most considered a part of the skeletal system? Answer: the femur.
answer:

skeletal system is made of bones


