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:
dorothea sally eilers (or just sally eilers; december 11, 1908 – january 5, 1978) was an american actress.

Ex Output:
sally eilers


Ex Input:
the demographics of pakistan are a study of the population and the people.

Ex Output:
demographics of pakistan


Ex Input:
maría de la paz elizabeth sofía adriana de la huerta y bruce (born september 3, 1984), known by her stage name paz de la huerta ], is an american actress and model.

Ex Output:

paz de la huerta