In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

[Q]: Sentence: When the core of a star begins to run low on hydrogen, it contracts. Question: What happens to the core of a star when it begins to run low on hydrogen?
[A]: it contracts


[Q]: Sentence: Cloud of these can make a shadow on the ground during the day. Question: Which of these can make a shadow on the ground during the day?
[A]: Cloud


[Q]: Sentence: Nonmetals is the second largest class of elements. Question: What is the second largest class of elements?
[A]:
nonmetals