Definition: 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.
Input: Sentence1: In 2010 my daughter's college roommate got married. Sentence2: The wedding was in Sacramento, and a lot of college friends attended. Sentence3: My daughter saw a college friend's girlfriend cheating on him. Sentence4: She told the friend, and he confronted his girlfriend. Sentence5: The trip back to Boston was tense.
Output:
Friend's girlfriend, College friends, College roommate, My daughter