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: Paul had a problem with drugs. Sentence2: His Father was very concerned for him. Sentence3: He put him in a rehab center to get help. Sentence4: Paul stayed there for sixty days. Sentence5: He learned how bad drugs really were and never did them again.

Answer: Paul, Father

Question: Sentence1: Barry recently had to take a reading test for college. Sentence2: Barry was nervous, as he did not know what was on the test. Sentence3: However, as Barry was taking the test, he realized how much he knew. Sentence4: As the test went along, Barry felt more confident about it. Sentence5: Barry knew that he had passed the reading test he took.

Answer: Barry

Question: Sentence1: My friend Sam has been taking melatonin for sleeping. Sentence2: He said yesterday he dreamed of a pretty yellow eyed woman. Sentence3: He said the dream was vivid and sexual. Sentence4: I warned him about taking too much medication. Sentence5: He claims melatonin is harmless.

Answer:
I (myself), Yellow eyed woman, Sam