She is lost in memories from her past.
Mental hospitals are worse than prison because mental hospitals there is no exercise, no counseling, nothing to do but therapy which is not always helpful . And prisons the inmates are encouraged, talked up their expected to do some for of employment, education.
They have basic information such as birthdays, love lives, life events.
A biography means it was not written by the person its about, so when the narrator is speaking look for pronouns such as "he/she", because that means they are not talking about themselves.
Hope this helps!
-Payshence