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: Katrina's friends took her to a taco truck. Sentence2: She had never eaten from a food truck before. Sentence3: The idea was disgusting to her. Sentence4: After tasting her tacos, she changed her mind. Sentence5: Katrina only wants to eat from the taco truck.
Output:
Katrina's friends