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.
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Question: Who sings the theme song from phineas and ferb?

Answer: Bowling for Soup


Question: Who plays in the fa cup final 2018?

Answer: Chelsea and Manchester United


Question: Who is credited with the discovery of the milky way?

Answer:
Galileo Galilei