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.

Input: Consider Input: serie d is the top level of the non-professional football clubs in italy.

Output: serie d


Input: Consider Input: the beethoven house (german: beethoven-haus) in bonn, germany, is a memorial site, museum and cultural institution serving various purposes.

Output: beethoven house


Input: Consider Input: meaning is a term in linguistics and philosophy.


Output: meaning