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.

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

Ex Output:
Tunisia


Ex Input:
When was the pledge of allegiance started in schools?

Ex Output:
October 12, 1892


Ex Input:
Which layer of the epidermis is not found in all types of human skin?

Ex Output:

clear/translucent layer