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

Example Input: What is the nationality of Chelsy Davy, former girlfriend of Prince Harry?
Example Output: chelsy davy

Example Input: Who served in the Crimean War (1854 - 56), was responsible for suppressing the Taiping rebellion in China in 1860, was governor of the Sudan 1877 - 79, and died there?
Example Output: taiping rebellion

Example Input: Which Dutch airline merged with Air France in 2004?
Example Output:
airline