instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which 1970s musical film starred Angela Lansbury as a trainee witch?
answer:
angela lansbury

question:
What is the second book of the Bible?
answer:
bible

question:
What, resembling a tomato and pepper hybrid, is the edible fruit produced by Diospyros trees, source of ebony wood?
answer:
diospyros