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:
Who is the best selling novelist of all time?
answer:
Dame Agatha Mary Clarissa Christie, Lady Mallowan, DBE


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


question:
When is sea of thieves coming to pc?
answer:

20 March 2018