Q: 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.
Sentence1: Ian stood on his roof and shouted through a megaphone. Sentence2: He ranted about the government and society. Sentence3: When he started ranting about pop stars a voice came back at him. Sentence4: Another person on the other side of town shouted through a megaphone. Sentence5: Ian enjoyed a spirited conversation via megaphone with the stranger.
A:
Pop stars, Another person, Ian