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

Now, solve this: Sentence1: Last Saturday morning, I was busy doing laundry in our garage. Sentence2: Our washer and dryer is out there because the house is small. Sentence3: My cat Lucy was keeping me company while I folded the whites. Sentence4: Suddenly I heard an awful loud screeching sound! Sentence5: Lucy had a huge gray rat in her mouth that was singing it's last song.
Solution:
I (myself), Rat, Lucy