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: Dave was a scientist. Sentence2: Dave wanted to make a great scientific discovery. Sentence3: Dave worked with algae to make electricity. Sentence4: Dave discovered he could make electricity with algae! Sentence5: Dave was awarded for his great discovery.

Answer: Dave

Question: Sentence1: Simon invited his friend Joey over for a play-date. Sentence2: He was looking forward to playing Minecraft with his friend. Sentence3: Right before Joey arrived, the internet went out. Sentence4: Simon tried resetting the router, but it didn't help. Sentence5: Simon and Joey played outside until the router was back online.

Answer: Simon, Joey

Question: Sentence1: Samantha was at a pizza party. Sentence2: She and some other kids were checking out a crane game. Sentence3: She decided to give it a try. Sentence4: Somehow, she managed to win. Sentence5: She got a pink gorilla toy and gave it to her little brother.

Answer:
Samantha, Brother, Other kids