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

Input: Consider Input: In which war did the Sack of Badajoz takeplace?

Output: siege of badajoz


Input: Consider Input: Which evolutionary biologist wrote The Ancestor's Tale in 2004?

Output: the ancestor's tale


Input: Consider Input: Which planet has one moon called Charon?


Output: charon