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: Hank made an appointment to see a house. Sentence2: He was supposed to meet the realtor at his office. Sentence3: Hank didn't see the agent's office and drove right by it. Sentence4: He continued on to the house itself. Sentence5: Hank called the agent to ask to meet him there at the house instead.

A: Hank, Realtor
****
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: Sam got himself something to drink. Sentence2: He set it on the edge of the table. Sentence3: His cat got close to it. Sentence4: Sam told him to get away. Sentence5: The cat knocked over the drink anyway.

A:
His cat, Sam
****