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.
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Question: Sentence1: John did not know how to roller skate. Sentence2: His friend said that he would teach him. Sentence3: They spent all day practicing skating. Sentence4: John kept trying and got very good. Sentence5: Now he roller skates all over the neighborhood.

Answer: John, Friend

Question: Sentence1: Jill had set a goal for herself in the seventh grade. Sentence2: She maintained the highest grades ever since then. Sentence3: She was determined to be valedictorian. Sentence4: When she became a senior, she still had that goal. Sentence5: At graduation, she met her goal and presented her speech.

Answer: Jill

Question: Sentence1: John played an online game. Sentence2: He looked for a community that was targeted towards it. Sentence3: John found an online forum dedicated to the game. Sentence4: John found out they were setting up live meetings. Sentence5: John went to a live meeting and made a lot of friends.

Answer:
John, Friends