Q: 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: I was walking my dog one afternoon. Sentence2: While walking on the sidewalk, I noticed something in the grass. Sentence3: I walked over to the object to see what it was. Sentence4: I noticed that it was twenty dollars and became excited. Sentence5: I picked up the money and put it in my wallet.
A:
I (myself), Dog