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: leaf storm is a short story written by nobel prize-winning author gabriel garcía márquez.
Example Output: leaf storm

Example Input: canada day is a national and an official holiday in canada celebrating its anniversary of confederation.
Example Output: canada day

Example Input: djalminha (born december 9, 1970) is a former brazilian football player.
Example Output:
djalminha