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.

Sentence1: Lou's dad went fishing with his friends one Saturday a month. Sentence2: Lou always asked to go along but his dad said he was too little. Sentence3: Then one day, Lou's dad said he could go! Sentence4: He and his dad went out on a boat with fishing poles. Sentence5: He was very excited when he caught his first fish that day.
His dad, Friends, Lou

Sentence1: Simy heard her mom speaking to her grandma about a lost letter. Sentence2: She asked her mom what happened. Sentence3: Her mom said her grandma had lost a special letter from her grandpa. Sentence4: Simy felt sad but soon forgot as she played. Sentence5: While putting her toys away she found the letter on a toy shelf.
Simy, Grandpa, Mom, Grandma

Sentence1: One day, a telemarketer called the Davis family. Sentence2: The marketer asked about their political affiliations. Sentence3: The father told the man on the phone that they were Democrats. Sentence4: The man on the phone laughed. Sentence5: The father got mad and hung up.
Telemarketer, Father, Telemarker, Davis family