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

Example Input: Brasilia is the capital but which city in Brazil has the largest population?
Example Output: brazil

Example Input: Who composed 'Eine Kleine Nachtmusik' in the 18th Century?
Example Output: eine kleine nachtmusik

Example Input: What is the name of Albania's unit of currency?
Example Output:
albania