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:
he is more often called davy crockett.

Ex Output:
davy crockett


Ex Input:
louis meyers (1955 or 1956 – march 11, 2016) was a american festival organizer and co-founder of south by southwest.

Ex Output:
louis meyers


Ex Input:
vaginal lubrication is wetness when a woman is sexually excited.

Ex Output:

vaginal lubrication