Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Input: Consider Input: What's the name of Doctor Who's home planet ?

Output: doctor who


Input: Consider Input: Come Clean was the debut album by which 2000s band?

Output: come clean


Input: Consider Input: Which English novelist wrote Decline and Fall, Brideshead Revisited and Officers and Gentlemen?


Output: decline and fall