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: The element carbon on the periodic table forms the most diverse compounds. Question: What element on the periodic table forms the most diverse compounds?
carbon

Sentence: Reversible process is the name of the process in which both the system and its environment can return to exactly the states they were in by following the reverse path. Question: What is the name of the process in which both the system and its environment can return to exactly the states they were in by following the reverse path?
reversible process

Sentence: The number of neutrons can vary between atoms of the same element. Question: The number of what subatomic particles can vary between atoms of the same element?

neutrons