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: Warren didn't like beets and told his mom repeatedly. Sentence2: But as she never listened, he had some on his plate for dinner. Sentence3: He tried to give them to his dog. Sentence4: The dog sniffed them and walked away. Sentence5: Warren refused to eat the beets as his dog didn't want them either.

SOLUTION: Dog, Mom, Warren

PROBLEM: Sentence1: Bob hated his current cable provider. Sentence2: He decided to cancel the services. Sentence3: He started looking for a new provider. Sentence4: He found a great deal and bought it. Sentence5: His new provider was great!

SOLUTION: Bob, Bob's new cable provider

PROBLEM: Sentence1: My friend was so excited when I saw her. Sentence2: She had such great news to tell me. Sentence3: I could not wait to hear the news either. Sentence4: She had got the promotion at work. Sentence5: We both screamed in excitement together.

SOLUTION:
I (myself), Friend