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.
Example: Sentence1: My dog was bored. Sentence2: I was working all day so I couldn't spend time with him. Sentence3: When I finished work I decided to play with my dog. Sentence4: He was so happy to finally have some fun! Sentence5: Alas, he fell sick and died.
Example solution: I (myself), Dog
Example explanation: There is only two characters in given story, i.e., I (myself) and dog.

Problem: Sentence1: Ella and Frank had been wed for six years. Sentence2: They wanted a home of their own, despite high costs and few savings. Sentence3: They decided to buy several acres of land and build their own home. Sentence4: After they signed the deed, Frank called a few reliable acquaintances. Sentence5: Then they got their tools together and made a small, cozy home!
Solution: Frank, Ella, Acquaintances