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.
Input: Sentence1: Gina was in the backseat of the car on a road trip. Sentence2: It was night and her siblings were asleep. Sentence3: Gina spent the afternoon sleeping, and was now awake. Sentence4: She decided to try and read. Sentence5: The car was too dark, so she gave up and put her book away.
Output:
Gina, Gina's siblings