Given a question, generate a paraphrase of that question wihout changing the meaning of it. Your answer should reword the given sentence, but not add information to it or remove information from it. The answer to your question should be the same as the answer to the original question.
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Question: Question: what is the name of the unit of currency in the us?

Answer: what is the currency of usa?


Question: Question: when did vincent von gogh die?

Answer: what year did vincent van gogh die?


Question: Question: what forms the eastern border of iowa?

Answer:
what river forms the eastern borders of iowa?