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.

[EX Q]: Sentence1: Ruth was visiting her grandfather's farm. Sentence2: She liked animals but the tall horses scared her. Sentence3: Ruth's grandpa brought her to one of the horses. Sentence4: He showed Ruth that the horse was kind and gentle. Sentence5: Soon Ruth felt much less scared and calmed down.
[EX A]: Ruth, Grandpa

[EX Q]: Sentence1: Dan wanted to get some exercise in today. Sentence2: Dan decided he would go to the local pool and swim several laps. Sentence3: However, when Dan arrived he noticed the facility was closed. Sentence4: Dan decided he would go back home and exercise there. Sentence5: Dan was disappointed that he could not swim in the pool.
[EX A]: Dan

[EX Q]: Sentence1: Ron ordered delivery pizza and was looking for his wallet to pay. Sentence2: The delivery guy knocked on the door but Ron couldn't find the wallet. Sentence3: Ron apologized and asked the pizza guy to wait a minute. Sentence4: The pizza guy shows him a wallet he found in the driveway. Sentence5: Ron thanked him for finding the wallet and gave him a huge tip.
[EX A]:
Ron