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: Simon started a fire in the fireplace. Sentence2: To make the fire burn hotter he added a lot of wood. Sentence3: The wood created a huge flame in the fireplace. Sentence4: The fire caught some residue in the chimney on fire. Sentence5: Simon called the fire department to put out the fire.
A:
Simon