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: Helen was digging in the dirt. Sentence2: She was harvesting potatoes. Sentence3: She pulled them out and put them in a basket. Sentence4: She planned on making a huge batch of mashed potatoes. Sentence5: It was going to be delicious!
Helen