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.

Sentence: Nuclei with even numbers of protons, neutrons, or both are more likely to be stable. Question: Nuclei with even numbers of protons, neutrons, or both are more likely to be this?
stable

Sentence: The vertebrate endoskeleton can also be called a(n) internal skeleton. Question: The vertebrate endoskeleton can also be called what?
internal skeleton

Sentence: Medium is the matter through which sound waves travel. Question: What is the matter through which sound waves travel?

medium