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 plays agent romanoff in iron man 2?

Answer: Scarlett Johansson


Question: What state in america has the best education?

Answer: Montana


Question: Where do dust storms occur in the world?

Answer:
arid and semi-arid regions