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: When does exchange of dna segments happen between non-sister chromatids of homologous chromosomes? Answer: during crossing-over

Ex Output:
Exchange of dna segments happens between non-sister chromatids of homologous chromosomes during crossing-over.


Ex Input:
Question: A diet rich in calcium and what vitamin may reduce the risk of osteoporosis and related bone fractures? Answer: vitamin d

Ex Output:

A diet rich in calcium and vitamin d may reduce the risk of osteoporosis and related bone fractures.