Simplify the following text for a Grade 10 native English-speaking person.
Original: Only 41 when her husband became president , Sarah Polk outlived several of her successors : Margaret Taylor , Abigail Fillmore , Jane Pierce , Mary Todd Lincoln , Eliza Johnson and Lucy Webb Hayes .
Simplified: Sarah Polk , as the First Lady of the United States , even outlived several of her successors . She lived longer than Margaret Taylor , Abigail Fillmore , Jane Pierce , Mary Todd Lincoln , Eliza McCardle Johnson and Lucy Webb Hayes .