Who was the longest serving United States president?
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The American Civil War was a significant event in the United States, where the country is located.
The United States of America was the location of the American Civil War and is the country of the United States .
Who was the longest serving United States president?</s>The [unused1]American Civil War                [unused2] was a significant event in the United States, where the country is located.
Who was the longest serving United States president?</s>The American Civil War was a significant event in the United States, where the country is located.
Who was the longest serving United States president?</s>The United States of America was the location of the [unused1]American Civil War                [unused2] and is the country of the United States .
Who was the longest serving United States president?</s>The United States of America was the location of the American Civil War and is the country of the United States .
Who was the longest serving United States president?</s>United States of America,country,United States of America,United States of America,significant event,[unused1]American Civil War[unused2],[unused1]American Civil War[unused2],0,United States of America,[unused1]American Civil War[unused2],0,[unused1]American Civil War[unused2]
Who was the longest serving United States president?</s>United States of America,country,United States of America,United States of America,significant event,American Civil War,American Civil War,0,United States of America,American Civil War,0,American Civil War