Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Sentence1: Chris contacted Lisa. Sentence2: He offered to pay her money for typing a research paper. Sentence3: She accepted the task and wrote it within a week. Sentence4: When the teacher graded it, she gave Chris an F. Sentence5: Since Chris ultimately failed the work and class, he never paid Lisa.
Student:
Chris, Lisa, Teacher