Input (grade 13): So each commune in France does not only have one figure for the population, but several; for example students may be counted both where they study and where they live when not actively studying.
Output (grade 7): Because of this, each commune in France has more than just one number of how many people live in it, but many. For example, students may be counted where they study and where they live but do not study (they place they were born in).