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.

Q: Sentence1: Alex had a young son. Sentence2: The boy was three years old. Sentence3: He still wasn't speaking. Sentence4: Alex told the doctor about his speech issue. Sentence5: Alex's son started to see a speech therapist.

A: Speech therapist, Alex, Young son, Doctor
****
Q: Sentence1: I bought bubbles to play with the dog. Sentence2: I blew the bubbles outside in the yard. Sentence3: She chased them around, trying to catch them. Sentence4: She snapped at the bubbles as they floated. Sentence5: After she was tired, we went back in the house.

A: I (myself), Dog
****
Q: Sentence1: The man cleaned the litter box. Sentence2: Some of the litter got on the floor. Sentence3: The man didn't clean up the litter on the floor. Sentence4: The man's wife saw the mess. Sentence5: She told the husband to clean it up.

A:
Wife, Man
****