Detailed Instructions: 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.
Q: Sentence1: Kelly enjoyed biking a lot. Sentence2: She biked with her friends almost every day. Sentence3: One day, she fell off her bike and broke her leg. Sentence4: At the hospital, the doctor told her it would be good in 3 months. Sentence5: After three months, Kelly was able to bike once more.
A:
Kelly, Her friends, Doctor