instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Who had hits with Stepping Out and Different For Girls?
answer:
different for girls

question:
Who directed the film 'Back To The Future'?
answer:
back to the future

question:
Which of Dicken's' novels features 'Sir John and Edward Chester'?
answer:
edward