instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
What name was given to the 1950-60s mainstream country music style of artists including Patsy Cline, Tammy Wynette, Jim Reeves, and Charlie Rich?
answer:
charlie rich


question:
Which English classic horse race for 3 year olds held at Doncaster every September began in 1776?
answer:
doncaster racecourse


question:
In which English city would you find Clifford's Tower?
answer:

york castle