Teacher: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Teacher: Now, understand the problem? If you are still confused, see the following example:
The Inheritance Cycle is a series of fantasy books written by Christopher Paolini.
Solution: The Inheritance Cycle is a tetralogy of young adult high fantasy novels written by American author Christopher Paolini.
Reason: The output sentence elaborates on the input sentence without changing its general meaning e.g. "tetralogy of young adult high fantasy novels".

Now, solve this instance: Usually , municipalities are the smallest subdivisions of Belgium , but in municipalities with more than 100,000 people living there , they get divided into districts .
Student:
In most cases , the municipalities are the smallest administrative subdivisions of Belgium , but in municipalities with more than 100,000 inhabitants , on the initiative of the local council , sub-municipal administrative entities with elected councils may be created .