You will be given a definition of a task first, then some input of the task.
In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: Tatiana was walking through her school hallway when she found a key. Sentence2: She wondered who the owner was and what to do about it. Sentence3: Then, she remembered her school and a lost and found section. Sentence4: It wasn't long before the key was given to its rightful owner. Sentence5: Tatiana felt proud of her good deed.
Output:
Tatiana's school, Tatiana, The owner of the key