instruction:
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.
question:
Where does the water come from for victoria falls?
answer:
Zambezi River


question:
When did star spangled banner became the national anthem?
answer:
March 3, 1931


question:
Who is the founder of babylon as recorded in the bible?
answer:

Nimrod