instruction:
Given a statement, generate a question such that the answer is contained in that statement.
question:
Triceps tighten causing a person's elbow to straighten.
answer:
What tightens causing a person's elbow to straighten?


question:
climate conditions can bury the planet in snow
answer:
What can climate conditions bury the planet?


question:
The period after puberty is a time of significant mental, emotional, and social changes.
answer:

The period after puberty is a time of what?