Simplify the following text for a Grade 5 native English-speaking person.
Original: According to the revisionist version of the Oz history chronicled in Gregory Maguire 's novel Wicked : The Life and Times of the Wicked Witch of the West , the slippers were given to Nessarose , the Wicked Witch of the East , by her father .
Simplified: Dorothy gets the slippers after her house falls on the Wicked Witch of the East , killing the witch . The witch 's sister , the Wicked Witch of the West , wants the ruby slippers .