In this task, you are given a paragraph, and your task is to construct a question from the given passage. Construct question in such a way that (i) it is well explained in the paragraph, (ii) the words may/may not be present in the paragraph, (iii) it should start with what/how/describe. Avoid creating a question that (i) is just relevant to one or two sentences, and (ii) not relevant to passage. 

Input: Consider Input: The gravity of the sun pulls its mass inward. There is a lot of pressure on the Sun. The pressure forces atoms of hydrogen to fuse together in nuclear reactions. The energy from the reactions gives off different kinds of light. The light travels to the Earth. 

Output: How is sunlight created?


Input: Consider Input: Food enters the body. The food is broken down. Sugars from the food enter the bloodstream. Blood sugar must be within a particular range to avoid damaging many organs. Sometimes the brain tells the pancreas the blood sugar (glucose) is too low. The pancreas releases glucagon to change the blood sugar to a better level. Sometimes the brain tells the pancreas the blood sugar (glucose) is too high. The pancreas releases insulin to change the blood sugar to a better level. 

Output: How does the body control its blood sugar level?


Input: Consider Input: You breathe in. Air goes through all the little branches in your lungs to fill up the air sacs, or alveoli. Oxygen goes through the walls of the alveoli and into the capillaries. The oxygen goes into the bloodstream. Oxygen is left and carbon dioxide is picked up. You breathe it out through your lungs. 


Output: How do the lungs work?