instruction:
Given a statement, generate a question such that the answer is contained in that statement.
question:
breathing begins with breathing in air or oxygen
answer:
What type of air does breathing begin with?

question:
A person's arm straightens when muscles antagonistic to biceps contract
answer:
What straightens when muscles antagonistic to biceps contract?

question:
Working out requires a lot of energy
answer:
How much energy does working out require?