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 Q]: Question: What are four children born at one birth called? Answer: quadruplets
[EX A]: Four children born at one birth are called quadruplets.

[EX Q]: Question: The atoms of a compound are held together by what type of bonds? Answer: chemical
[EX A]: The atoms of a compound are held together by chemical bonds.

[EX Q]: Question: How do the vast majority of fish reproduce? Answer: sexually
[EX A]:
The vast majority of fish reproduce sexually.