Q: 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.
Sentence1: Tom wanted to figure out the beating in his chest. Sentence2: He asked his brother. Sentence3: His brother said it rhymes with art. Sentence4: Tom thought hard. Sentence5: Then he realized it was his heart.
A:
His brother, Tom