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:
the vektor r4 is a south african assault rifle.

Ex Output:
vektor r4


Ex Input:
dakota johnson (born october 4, 1989 in austin, texas) is an american actress and model.

Ex Output:
dakota johnson


Ex Input:
the bafta award for best makeup and hair is one of several awards of the british academy of film and television arts (bafta).

Ex Output:

bafta award for best makeup and hair