What is the longest river in the United States?
system
What is the longest river in the United States?
user
The Missouri River is the longest in the United States. It is 2,540 miles long, starting at the mountains in Montana and ending in St. Louis, Missouri.
assistant
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</s>
<|user|>
What is the longest river in the United States?</s>
<|assistant|>
The Missouri River is the longest in the United States. It is 2,540 miles long, starting at the mountains in Montana and ending in St. Louis, Missouri.</s>
