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: Carl's sprinkler was broken. Sentence2: It chaotically sprayed water everywhere. Sentence3: He was planning to get it fixed. Sentence4: But he decided to play in it on a hot day. Sentence5: To Carl, the sprinkler was perfect.
A:
Carl