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 Q]: Who was the first president who lived in the white house?
[EX A]: John Adams

[EX Q]: What was the name of the super continent during the mesozoic era?
[EX A]: Pangaea

[EX Q]: Who sings keep your head to the sky?
[EX A]:
Earth, Wind & Fire