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: Sean's microwave broke. Sentence2: He needed a new microwave. Sentence3: He went to the store and bought a microwave. Sentence4: Unfortunately, the new microwave had a defect. Sentence5: Sean cried in frustration.
A:
Sean