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: In 550 bc which leader began the persian empire?

Answer: Cyrus II of Persia


Question: What episode does michael and sara get together?

Answer: The Final Break


Question: When was the democratic republic of vietnam founded?

Answer:
2 September 1945