In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

Example Input: In which country did an event occur that led to the 2011 arab spring?
Example Output: Tunisia

Example Input: Who was the 20th prime minister of canada?
Example Output: Jean Chretien

Example Input: Where does the chancellor of the exchequer live?
Example Output:
11 Downing Street