TASK 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.
PROBLEM: Sentence1: Dan had a very fine cobblestone walkway. Sentence2: Some of the stones had started to jut out unevenly. Sentence3: Dan got out a shovel and leveled the dirt under them. Sentence4: He tamped them down gently to make them all match. Sentence5: Now the stones in Dan's walkway are all perfectly even.

SOLUTION: Dan

PROBLEM: Sentence1: Kate was sipping on orange soda and sketching in her sketch book. Sentence2: Her brother and his friend came in the room. Sentence3: They were throwing a football around. Sentence4: It landed and knocked over Kate's soda. Sentence5: The orange soda ruined Kate's drawing.

SOLUTION: Kate, Friend, Brother

PROBLEM: Sentence1: Chris was a nurse. Sentence2: She was very experienced. Sentence3: One day she made a medication error. Sentence4: It didn't have any negative effect on her patient. Sentence5: Chris chose to report the incident to her supervisor.

SOLUTION:
Chris, Patient