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: The mass of atoms is based on the number of protons and neutrons in what? Answer: nucleus

Ex Output:
The mass of atoms is based on the number of protons and neutrons in nucleus.


Ex Input:
Question: What form when water vapor condenses in the air around specs of matter? Answer: clouds

Ex Output:
Clouds form(s) when water vapor condenses in the air around specs of matter.


Ex Input:
Question: Neutron stars are the corpses of left over what? Answer: supernova explosions

Ex Output:

Neutron stars are the corpses of left over supernova explosions.