instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
What is the county town of Derbyshire?
answer:
derbyshire


question:
Who played Bonnie in the 1967 film `Bonnie And Clyde`?
answer:
bonnie and clyde


question:
According to legend, who was King Arthur's father?
answer:

king arthur