Simplify the following text for a Grade 5 native English-speaking person.
Original: The only background information presented about Chell is given by GLaDOS ; the credibility of these facts , such as Chell being adopted , an orphan , and having no friends , is questionable at best , as GLaDOS is a liar by her own admission .
Simplified: Chell , trying to escape the building , is led into a room where she fights GLaDOS . Chell breaks a Morality Core that fell out of GLaDOS .