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.
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Question: Sentence1: Ana needed gas in her car. Sentence2: But the prices in her town were so high! Sentence3: She took a drive out the the reservation. Sentence4: There, gas was almost a dollar cheaper. Sentence5: Ana filled her tank at the reservation!

Answer: Ana

Question: Sentence1: The boy asked for permission. Sentence2: Permission was denied. Sentence3: The boy did it anyways. Sentence4: He got caught. Sentence5: The boy was punished.

Answer: Boy

Question: Sentence1: Colin always wanted to try rally driving. Sentence2: He bought himself a driving experience to try it out. Sentence3: When he got to it, Colin was very timid. Sentence4: He didn't want to crash the car. Sentence5: By the end of the day, Colin was glad that he did it.

Answer:
Colin