James Madison started to be the oldest US President at his 75 years, 110 days for a duration of 3,647 days
[['James Madison', 'AGE_AT_START_DATE', '75 years, 110 days'], ['9 years, 360 days', 'DURATION_(DAYS)', '3,647 days'], ['James Madison', 'DURATION', '9 years, 360 days'], ['[TABLECONTEXT]', '[TITLE]', 'List of Presidents of the United States by age'], ['[TABLECONTEXT]', 'PRESIDENT', 'James Madison']]