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.

Example Input: in 1920 the name was changed from fv to sv werder bremen.
Example Output: werder bremen

Example Input: a bite is a wound received from the teeth of an animal.
Example Output: bite

Example Input: rudolf kargus (born 15 august, 1952) is a former german football player.
Example Output:
rudolf kargus