Simplify the following text for a Grade 7 native English-speaking person.
Original: Elizabeth Priscilla Cooper Tyler ( June 14 , 1816 -- December 29 , 1889 ) was the daughter in law of John Tyler , the tenth President of the United States .
Simplified: Elizabeth Priscilla Cooper Tyler ( June 14 , 1816 â `` December 29 , 1889 ) was the daughter in law of John Tyler . John Tyler was the tenth President of the United States .