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: The aliens converged on Cleveland. Sentence2: There were ones from all the great universes. Sentence3: They attended conferences and had greasy meals. Sentence4: Some of them hadn't been on shows for decades. Sentence5: Then they left, not to come back until the conference next year.
A:
Aliens