Simplify the following text for a Grade 5 native English-speaking person.
Original: Two young women claiming to be Anastasia and her sister Maria were taken in by a priest in the Ural Mountains in 1919 where they lived as nuns until their deaths in 1964 .
Simplified: A priest took care of two young women who said that they were Anastasia and her sister Maria in the Ural Mountains in 1919 . They lived there as nuns until they died in 1964 .