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: Professor Banns was a very elderly history professor. Sentence2: He fell asleep in a chair in the staff lounge and then died. Sentence3: He was discovered deceased by another staff member. Sentence4: All students and staff attended his funeral. Sentence5: It was necessary to hire another teacher to teach history.
Output:
Staff member, Students, Another teacher, Professor banns, Staff