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: Will and his roommate were having an argument about pizza. Sentence2: They disagreed on which topping was better - ham or bacon. Sentence3: Will ordered a pizza, half with ham and half with bacon. Sentence4: The two guys did a taste test using the pizza. Sentence5: They both decided that bacon is the better pizza topping.
Solution: Will, Roommate