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: Ben was taking pictures in school. Sentence2: He wanted to take a photo in front of the library. Sentence3: He took a picture although some people were in the way. Sentence4: They learned a clicking noise from the camera. Sentence5: Since they knew that they were in the photo, they were mad.
A:
Ben, Some people