How many presidents have been re-elected after their first term in the United States
There have been twenty-one U.S. presidents who have served a second term.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:

How many presidents have been re-elected after their first term in the United States

### Response:

There have been twenty-one U.S. presidents who have served a second term.
