Simplify the following text for a Grade 6 native English-speaking person.
Original: Grace Anna Goodhue Coolidge ( January 3 , 1879 â `` July 8 , 1957 ) was the wife of Calvin Coolidge and First Lady of the United States from 1923 to 1929 .
Simplified: Grace Anna Goodhue Coolidge ( January 3 , 1879 â `` July 8 , 1957 ) was the wife of Calvin Coolidge , the President of the United States . She acted as the First Lady of the United States from 1923 to 1929 .