Detailed Instructions: 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.
Q: Sentence1: Helen went to a meat factory. Sentence2: She saw how some of the animals are treated. Sentence3: She decides to change her ways. Sentence4: She becomes vegan. Sentence5: She has since convinced others to do so too.
A:
Others, Animals, Helen