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.

[Q]: What is the si unit of time period?
[A]: second


[Q]: What value of the russian culture is represented in the story the nose?
[A]: outward appearance


[Q]: Who wrote the lyrics to the black national anthem?
[A]:
James Weldon Johnson