Simplify the following text for a Grade 9 native English-speaking person.
Original: Abigail Adams ( nÃ e Smith ; November 11 , 1744 -- October 28 , 1818 ) was the wife of John Adams , who was the second President of the United States , and the mother of John Quincy Adams , the sixth .
Simplified: Abigail Smith Adams ( November 11 , 1744 - October 28 , 1818 ) was the wife of John Adams , the second President of the United States .