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: Second most listened to artist on spotify 2018?

Answer: Austin Richard Post


Question: When did star spangled banner became the national anthem?

Answer: March 3, 1931


Question: What age can you serve alcohol in australia?

Answer:
18 years old