Definition: 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: Karin and Rory were vegans. Sentence2: They got into a discussion with Alex, who is not a vegan. Sentence3: They debated for a long time, but could not agree. Sentence4: They decided to agree to disagree. Sentence5: It was important to them to respect each other, despite disagreeing.
Output:
Rory, Alex, Karin