Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

Let me give you an example: fear of needles (medically known as belomophobia) is a term used to describe a large fear (phobia) of medical procedures involving needles.
The answer to this example can be: fear of needles
Here is why: in this statement, we are talking about the fear of needles hence the output of the statement is fear of needles

OK. solve this:
roderen is a commune.
Answer:
roderen