You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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.
Solution: I (myself), Dog
Why? There is only two characters in given story, i.e., I (myself) and dog.

New input: Sentence1: Cathy was chosen to be in charge of games for the company picnic. Sentence2: Cathy decided she would have miniature golf, and a foot race. Sentence3: In addition, Cathy decided to have kickball, and badminton as well. Sentence4: Cathy submitted the games for approval, and her manager accepted. Sentence5: Cathy could not wait to see her coworkers playing games at the picnic.
Solution:
Cathy, Coworkers, Her manager