Simplify the following text for a Grade 10 native English-speaking person.
Original: Lady Jane Grey ( 1536\/1537 â `` 12 February 1554 ) , also known as The Nine Days ' Queen , was an English noblewoman who occupied the English throne from 10 July until 19 July 1553 and was executed for high treason .
Simplified: Jane was an English noblewoman who occupied the English throne from 10 July until 19 July 1553 and was executed for high treason .