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.

Who is known as the father of indian nuclear programme?
Homi Jehangir Bhabha

When did the first season of greys anatomy air?
March 27, 2005

Where did the cherokee indian tribe come from?

Southeastern Woodlands of the United States