Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: In the lungs, oxygen diffuses out of the alveoli and into capillaries.

Output: In the lungs, oxygen diffuses out of the alveoli and into where?


Input: Consider Input: Stirring, surface area, and temperature affect the rate at solute dissolves what occurs.

Output: Stirring, surface area, and temperature affect the rate at which what occurs?


Input: Consider Input: The postpartum period starts after the baby is born, and the placenta is expelled from the body.


Output: What period starts after the baby is born, and the placenta is expelled from the body?