In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Ex Input:
Question: What are a class of tetrapod vertebrates that produce amniotic eggs called? Answer: reptiles

Ex Output:
Reptiles are a class of tetrapod vertebrates that produce amniotic eggs called.

Ex Input:
Question: Which observation demonstrates that light waves travel much faster than sound waves? Answer: An exploding firework is seen before it is heard.

Ex Output:
An exploding firework is seen before it is heard observation demonstrates that light waves travel much faster than sound waves.

Ex Input:
Question: The insect reaches full size, acquires wings, and becomes sexually mature after what final stage? Answer: molt

Ex Output:
The insect reaches full size, acquires wings, and becomes sexually mature after molt final stage.