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.
Input: Sentence1: Gerald was reading a book and felt inspired. Sentence2: Gerald decided that he was going to write a book. Sentence3: Gerald started planning out the book in several notebooks. Sentence4: After a few weeks, he started writing it. Sentence5: He published it on his own online and made some money from it.
Output:
Gerald