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.

Example Input: Who wrote if we never meet again this side of heaven?
Example Output: Albert Edward Brumley

Example Input: Who led the us movement to take over the island of hawaii?
Example Output: John Leavitt Stevens

Example Input: When did the first fish appear in the fossil record?
Example Output:
about 530 million years ago