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

Ex Input:
A 50 ml graduated cylinder of the following tools would give the most precise measurement of 15 milliliters of water.

Ex Output:
Which of the following tools would give the most precise measurement of 15 milliliters of water?

Ex Input:
Water contains 3 atoms.

Ex Output:
How many atoms does water contain?

Ex Input:
The orbital is the region called where an electron is most likely to be found.

Ex Output:
What is the region called where an electron is most likely to be found?