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: the nepal bhasa wikipedia is the nepal bhasa-language edition of wikipedia.
Example Output: nepal bhasa wikipedia

Example Input: hop and go is a 1943 looney tunes short movie directed by u.s. corporal norman mccabe and released to movie theaters by rko radio pictures.
Example Output: hop and go

Example Input: east midlands airport is an international airport in the east midlands of england.
Example Output:
east midlands airport