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

Example Input: Andy Schleck competes in what sport at an international level?
Example Output: andy schleck

Example Input: What American swimmer won eight gold medals at the 2008 Olympics?
Example Output: 2008 summer olympics

Example Input: Edward II was murdered in the south tower of which castle?
Example Output:
edward ii of england