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:
Which country mainly makes up the Horn of Africa?
answer:
africa


question:
In which country can you find Ben Gurion International Airport, the country's largest?
answer:

ben gurion airport