instruction:
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.
question:
Sentence1: Tommy has a red balloon. Sentence2: It's his favorite color! Sentence3: But one day, the balloon lost it's air. Sentence4: Tommy was very sad. Sentence5: But he'll get a new balloon tomorrow, so it's not that bad.
answer:
Tommy

question:
Sentence1: Tom was walking around. Sentence2: He found a wallet on the ground. Sentence3: It was completely empty. Sentence4: Tom thought it was a nice looking wallet. Sentence5: He kept it for himself.
answer:
Tom

question:
Sentence1: Heather had four children. Sentence2: Her bladder was weak and she occasionally had leaks. Sentence3: One day at work, Heather and a co worker were watching videos. Sentence4: The videos were so funny that they laughed uncontrollably. Sentence5: Heather was mortified when she stood and found her pants soaked.
answer:
Co worker, Heather