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 beethoven house (german: beethoven-haus) in bonn, germany, is a memorial site, museum and cultural institution serving various purposes.

Ex Output:
beethoven house


Ex Input:
nelsan ellis (november 30, 1977 – july 8, 2017) was an american actor and playwright.

Ex Output:
nelsan ellis


Ex Input:
marcia griffiths (born november 23, 1949) is a jamaican singer.

Ex Output:

marcia griffiths