TASK DEFINITION: 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.
PROBLEM: Sentence1: Tom was at the beach. Sentence2: He found a bottle with a message in it. Sentence3: The message had a contact e-mail. Sentence4: Tom e-mailed it and actually got a response. Sentence5: It was a pretty fun experience for him.

SOLUTION: Tom

PROBLEM: Sentence1: Fred carefully unhitched the rented trailer. Sentence2: As he went to strap on the chain he noticed a missing link! Sentence3: He ducked under the trailer to find the rest of the chain. Sentence4: Fred hadn't properly set the brake and it rolled backwards. Sentence5: He slowly starved to death and was eaten by wild animals.

SOLUTION: Fred

PROBLEM: Sentence1: Lucy and Lisa had been playing with house paint. Sentence2: Lisa left and went back home. Sentence3: Now Lucy had to keep her grandma from seeing the paint. Sentence4: Lucy crept in the house while her grandma watched TV. Sentence5: She changed her shirt and joined her glad to have gotten away with it.

SOLUTION:
Lisa, Lucy, Grandma