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:
Who is known as the father of indian nuclear programme?

Ex Output:
Homi Jehangir Bhabha


Ex Input:
What is the name of the tennessee titans football stadium?

Ex Output:
Nissan Stadium


Ex Input:
Where is oxygen attached on a hemoglobin molecule?

Ex Output:

iron atom