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 fed his baby boy another spoonful of banana baby food. Sentence2: The boy wouldn't take the last bite, instead reaching for Tom's food. Sentence3: Tom looked at his own bowl of unsugared grapefruit slices. Sentence4: After making sure his wife wasn't nearby, he let his son lick a slice. Sentence5: When the boy started crying, he had to assure his wife all was well.

SOLUTION: Baby, Wife, Tom

PROBLEM: Sentence1: An asteroid blazed across the sky. Sentence2: It fell to the ground with a soft shock. Sentence3: A man walked by and looked at it. Sentence4: The rock glowed with heat as he reached for it. Sentence5: The man felt the heat and back off until it was cool.

SOLUTION: A man

PROBLEM: Sentence1: Once a little girl got a puppy for Christmas. Sentence2: It was hidden inside a big red box. Sentence3: When she opened it she was very surprised! Sentence4: One day the puppy went missing. Sentence5: They found it in the big red box after all!

SOLUTION:
Little girl, Puppy