instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which English classic horse race for 3 year olds held at Doncaster every September began in 1776?
answer:
doncaster racecourse


question:
The film The Curious Case of Benjamin Button, starring Brad Pitt, is based on a short story by whom?
answer:
the curious case of benjamin button


question:
The Neil Simon plays The Prisoner of Second Avenue and Brighton Beach Memoirs are set in which city?
answer:

brighton beach memoirs