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: Kirk went to the bank to deposit a check. Sentence2: He was very late for work but stood in line anyway. Sentence3: The line moved very slowly. Sentence4: To pass the time he took a lollipop in one of the bowls. Sentence5: He had finished the lollipop when it was finally his turn.

SOLUTION: Kirk

PROBLEM: Sentence1: Julia was looking for her very favorite blouse. Sentence2: When she didn't find it she went to ask her sister. Sentence3: To her surprise her sister was wearing the shirt. Sentence4: She refused to take it off and Julia attacked her. Sentence5: Their dad broke it up and took the shirt away for good.

SOLUTION: Dad, Sister, Julia

PROBLEM: Sentence1: Mary had always wanted a dog. Sentence2: Mary's mother would never allow her to have a pet. Sentence3: One day, a dog followed Mary's mother home from the grocery store. Sentence4: The dog would not go away, but laid down on Mary's mother's' feet. Sentence5: The dog got to stay, and Mary got a new pet.

SOLUTION:
Mother, Mary, Dog