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 550 bc which leader began the persian empire?

Ex Output:
Cyrus II of Persia


Ex Input:
Who sang the original version of me and mrs jones?

Ex Output:
Billy Paul


Ex Input:
When does arrow season 6 air on tv?

Ex Output:

October 12, 2017