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: Amy was an elderly lady. Sentence2: She was in pain and asked her friend for help. Sentence3: Her friend recommended Pilates. Sentence4: Amy began doing Pilates everyday. Sentence5: Amy stopped feeling pain after doing Pilates regularly.
Output:
Amy, Her friend