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: Willy campaigned for his cause. Sentence2: He raised five hundred dollars. Sentence3: The money was spent wisely. Sentence4: The members of his cause benefited directly. Sentence5: They named a building after Willy.
Output:
Willy, Members