Detailed Instructions: 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.
Q: Sentence1: Ben was being fed by his mother. Sentence2: She was giving him carrots. Sentence3: Ben aggressively decided to chew the carrots. Sentence4: However, one of his teeth became loose. Sentence5: His mother had to push it out.
A:
Ben, Mother