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: Kelly decided to be adventurous. Sentence2: She decide to take the training wheels off her bike. Sentence3: Ultimately she fell off. Sentence4: Kelly sprained her ankle. Sentence5: Thankfully though, she was taken to the doctor.
Output:
Kelly, Doctor