Definition: 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.
Input: Sentence1: Ann worked in a high-rise building. Sentence2: One morning while on her break, she smelled smoke. Sentence3: She immediately let her boss know where she smelled the smoke. Sentence4: Her boss pulled the fire alarm and evacuated the office staff. Sentence5: Ann's quick reaction helped everyone to evacuate the building safely.
Output:
Boss, Ann, Everyone, Office staff