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

Ex Input:
The energy stored in the organic molecules of food ultimately comes from the sun.

Ex Output:
The energy stored in the organic molecules of food ultimately comes from where?


Ex Input:
Adding the number of protons plus the number of neutrons in an atom decides its approximate mass; atomic number is another word for this value.

Ex Output:
Adding the number of protons plus the number of neutrons in an atom, decides it's approximate mass, what is another word for this value?


Ex Input:
Taking glass bottles to a place that makes them into new bottles of these is an example of something being recycled.

Ex Output:
Which of these is an example of something being recycled?