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: Acids are associated with a low number on the ph scale. Question: Acids are associated with a low number on which scale?
[A]: ph


[Q]: Sentence: Meteorites are often comprised of remnants of the earliest material that formed in the solar system. Question: What astronomical phenomenon is often comprised of remnants of the earliest material that formed in the solar system?
[A]:
meteorites