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: We have over 50 cows that are across from our house. Sentence2: Every morning I go out on my front porch and see them gathering. Sentence3: I go out and enjoy my coffee while they are eating the morning grass. Sentence4: Sometimes the farmer gathers the cows in the barn. Sentence5: It's not quite as beautiful when they aren't there.
Cows, I (myself), The farmer