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 occurs when a substance reacts quickly with oxygen? Answer: combustion reaction

Ex Output:
Combustion reaction occurs when a substance reacts quickly with oxygen.


Ex Input:
Question: What is the most numerous species on the planet? Answer: bacteria

Ex Output:
Bacteria are the most numerous species on the planet.


Ex Input:
Question: What does the base of a nucleotide within dna consist of? Answer: nitrogen

Ex Output:

The base of a nucleotide within dna consists of nitrogen.