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: Sara's family went to a lake cabin for a vacation. Sentence2: She hated the lack of internet and phone service. Sentence3: She hated all of the bugs and the hiking. Sentence4: She hated all of the fishing and sitting around eating. Sentence5: Sara whined throughout the trip and came across as very ungrateful.
Output:
Sara's family