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: I came out of my class and walked to my locker. Sentence2: I pressed my foot on a broken tile and fell on the ground. Sentence3: At first, no one was willing to help me up. Sentence4: However, one of the teachers around the area helped me get up. Sentence5: She took me to the school's nurse.
Output:
I (myself), Nurse, Teacher