instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Grace Anna Goodhue was the wife of which US President?
answer:
grace coolidge

question:
Will you still be sending me a valentine is a line from which Beatles song?
answer:
the beatles

question:
Which of Dennis Potter's plays for television was about a group of 7 year old children playing in the woods, all of whom were played by adults?
answer:
dennis potter