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.

Ex Input:
tricity is a big centre for tourism.

Ex Output:
tricity


Ex Input:
land of the free is the national anthem of belize.

Ex Output:
land of the free


Ex Input:
the turkish new lira is the currency of turkey and the turkish northern republic of cyprus.

Ex Output:

turkish new lira