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

Example Input: In 1864, the Dale Dyke Dam burst while being filled, leading to the death of 240 people in which British city?
Example Output: dale dike reservoir

Example Input: Who won a Gold Medal for Britain in the men's 100 metres at the 1992 Summer Olympic Games in Barcelona?
Example Output: britain

Example Input: After a military coup on 21 March 2009, in which country did Andry Rajoelina became the youngest of the current heads of state in the world and the youngest head of state in Africa?
Example Output:
andry rajoelina