how did sally die in nightmare before christmas

Sally was created by the evil scientist Dr. Finkelstein, who made her out of spare parts and was not sure what to do with her. She was initially intended to be a companion for Dr. Finkelstein, but he soon grew bored of her and left her in his castle with no purpose. As a result, Sally became lonely and isolated, which eventually led to her developing a deep sense of sadness and despair. She was also the victim of constant bullying from the other residents of Halloween Town, who considered her to be an outsider.