Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
--------
Question: Which country mainly makes up the Horn of Africa?

Answer: africa


Question: Which 20th century British prime minister had the longest surname ?

Answer: prime minister of the united kingdom


Question: What British sitcom features Edina Monsoon and Patsy Stone, immature, prosperous, preposterous, substance-abusing fashion obsessed Londoners who value fame and style over substance?

Answer:
edina monsoon