Simplify the following text for a Grade 6 native English-speaking person.
Original: Julia Boggs Dent-Grant ( January 26 , 1826 -- December 14 , 1902 ) , was the wife of the 18th President of the United States , Ulysses S. Grant , and was First Lady of the United States from 1869 to 1877 .
Simplified: Julia Grant ( January 26 , 1826 â `` December 14 , 1902 ) , was the wife of Ulysses S. Grant , the President of the United States . She was the First Lady of the United States from 1869 to 1877 .