Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
--------
Question: In which town in California is Disneyland?

Answer: disneyland

Question: Which instrument was Benny Goodman famous for playing?

Answer: benny goodman

Question: Who was the 16th president of the U.S.A.,assasinated in 1865?

Answer:
assassination