Simplify the following text for a Grade 5 native English-speaking person.
Original: Elizabeth of York ( 11 February 1466 -- 11 February 1503 ) was Queen consort of England as spouse of King Henry VII from 1486 until 1503 , and mother of King Henry VIII of England .
Simplified: Elizabeth of York ( 11 February 1466-11 February 1503 ) married King Henry VII of England in 1486 . She is the mother of King Henry VIII .